Où trouver une implémentation MD5 en C++?

**Sunsawe** · 22/03/2009, 15h28

Bonjour,

Je cherche une implementation de l'algorithme MD5 en C++.
C'est facile à trouver en C mais je n'ai rien trouvé en C++.

Quelqu'un pourrait m'indiquer où chercher/trouver celà?

Merci

**droggo** · 22/03/2009, 16h05

Nai,

Je ne vois pas de difficulté majeure, ni même mineure, à adapter le code C en code C++.

**méphistopheles** · 22/03/2009, 16h07

Au pire, le C++ accepte le C donc tu pourrais prendre une bibliotèque C.

néanmoins, j'aurais tendance à dire:

.

en tapant MD5 C++, je trouve au quatrième résultat Cette implémentation C++ du MD5 qui devrait faire ton bonheur.

Bonne chance

**Sunsawe** · 22/03/2009, 17h02

Oui non mais en fait...
j'avais trouvé ce code mais j'espérais quelque chose totalement en C++.
Il n'y a aucun mal à utiliser le code fournit par cette page sauf que...

j'avoue! je suis une bille en C!!

et même si je comprend quelques trucs dans la source, y'a vraiment des (pour ne pas dire la plus part.. ) passages où je ne comprends rien à ce qui est fait.
J'ai tenté le parallèle avec la rfc mais ça atteint un niveau d'abstraction qui surpasse mon besoin de compréhension.

Je dirai pas non à un tuto "MD5 pour les nuls"...

**méphistopheles** · 22/03/2009, 17h14

mais ce que j'ai posté n'est pas en C mais en C++ et est relativement simple d'utilisation ! (et compatible avec les string)

il donne même un exemple sur la page d'accueil:

Code :

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#include "md5wrapper.h"
 
int main( int argc, char** argv )
{
	// creating a wrapper object
	md5wrapper md5;
 
	// create a hash from a string
	std::string hash1 = md5.getHashFromString("Hello World");
 
	// create a hash from a file
	std::string hash2 = md5.getHashFromFile("readme.txt");
 
	return 0;
}

bref, normalement, ça devrais rouler!

bonne chance

**Sunsawe** · 22/03/2009, 17h26

oui, ça ça va.

Mais c'est la mécanique derrière que j'espèrais trouver en C++.
juste histoire de ne pas avoir l'impression d'utiliser un wrapper sur une boite noire justement.
Tout en étant conscient que c'est une boite noire uniquement parce que je n'ai pas les connaissances requises en C .

**ram-0000** · 22/03/2009, 17h31

Les algorithmes utilisés en cryptigraphie sont des algorithmes complexes qui demandent plus que des solides notions en mathématique.

Personnellement, je ne me risque pas à essayer de comprendre les mécanismes mis en place, je copie colle, je vérifie avec les jeux d'essais si l'implémentation est correcte et point barre.

**Obsidian** · 22/03/2009, 23h59

Envoyé par ram-0000

Les algorithmes utilisés en cryptigraphie sont des algorithmes complexes qui demandent plus que des solides notions en mathématique.

Personnellement, je ne me risque pas à essayer de comprendre les mécanismes mis en place, je copie colle, je vérifie avec les jeux d'essais si l'implémentation est correcte et point barre.

Cependant, il y a algorithmes et algorithmes. En l'occurence, le MD5 peut être compliqué à démontrer, mais l'implémentation dans un langage donné est facile si on connaît l'algorithme général. Il est décrit sur Wikipédia, notamment, et il y a un exemple en pseudo-code.

**Sunsawe** · 07/05/2010, 11h20

merci pour vos réponses, j'ai pu y trouver ce que je cherchais.

**demboz** · 21/06/2013, 10h12

Bonjour à tous,

Je suis profane du MD5 raison pour la quelle je voudrais demander de l'aide le concernant. je voulais une explication de l'algorithme du MD5 et la traduction du code en C++. voici le code source:

Code :

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/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
 */
 
/* Copyright (C) 1991, RSA Data Security, Inc. All rights reserved.
 
   License to copy and use this software is granted provided that it
   is identified as the "RSA Data Security, Inc. MD5 Message-Digest
   Algorithm" in all material mentioning or referencing this software
   or this function.
 
   License is also granted to make and use derivative works provided
   that such works are identified as "derived from the RSA Data
   Security, Inc. MD5 Message-Digest Algorithm" in all material
   mentioning or referencing the derived work.  
                                                                    
   RSA Data Security, Inc. makes no representations concerning either
   the merchantability of this software or the suitability of this
   software for any particular purpose. It is provided "as is"
   without express or implied warranty of any kind.  
                                                                    
   These notices must be retained in any copies of any part of this
   documentation and/or software.  
 */
 
#include "mdx.h"
#include "md5.h"
 
/* Constants for MD5Transform routine.
 */
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
 
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST ((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST ((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
 
static unsigned char PADDING[64] = {
  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
 
/* F, G, H and I are basic MD5 functions.
 */
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
 
/* ROTATE_LEFT rotates x left n bits.
 */
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
 
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
   Rotation is separate from addition to prevent recomputation.
 */
#define FF(a, b, c, d, x, s, ac) { \
    (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
    (a) = ROTATE_LEFT ((a), (s)); \
    (a) += (b); \
  }
#define GG(a, b, c, d, x, s, ac) { \
    (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
    (a) = ROTATE_LEFT ((a), (s)); \
    (a) += (b); \
  }
#define HH(a, b, c, d, x, s, ac) { \
    (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
    (a) = ROTATE_LEFT ((a), (s)); \
    (a) += (b); \
  }
#define II(a, b, c, d, x, s, ac) { \
    (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
    (a) = ROTATE_LEFT ((a), (s)); \
    (a) += (b); \
  }
 
/* MD5 initialization. Begins an MD5 operation, writing a new context.
 */
void MD5Init (context)
MD5_CTX *context;                                                /* context */
{
  context->count[0] = context->count[1] = 0;
 
  /* Load magic initialization constants.
   */
  context->state[0] = 0x67452301;
  context->state[1] = 0xefcdab89;
  context->state[2] = 0x98badcfe;
  context->state[3] = 0x10325476;
}
 
/* MD5 block update operation. Continues an MD5 message-digest operation,
     processing another message block, and updating the context.
 */
void MD5Update (context, input, inputLen)
MD5_CTX *context;                                                /* context */
unsigned char *input;                                        /* input block */
unsigned int inputLen;                             /* length of input block */
{
  unsigned int i, index, partLen;
 
  /* Compute number of bytes mod 64 */
  index = (unsigned int)((context->count[0] >> 3) & 0x3F);
 
  /* Update number of bits */
  if ((context->count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3))
    context->count[1]++;
  context->count[1] += ((UINT4)inputLen >> 29);
 
  partLen = 64 - index;
 
  /* Transform as many times as possible.
   */
  if (inputLen >= partLen) {
    MD5_memcpy ((POINTER)&context->buffer[index], (POINTER)input, partLen);
    MD5Transform (context->state, context->buffer);
 
    for (i = partLen; i + 63 < inputLen; i += 64)
      MD5Transform (context->state, &input[i]);
 
    index = 0;
  }
  else
    i = 0;
 
  /* Buffer remaining input */
  MD5_memcpy 
    ((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i);
}
 
/* MD5 finalization. Ends an MD5 message-digest operation, writing the
     the message digest and zeroizing the context.
 */
void MD5Final (digest, context)
unsigned char digest[16];                                 /* message digest */
MD5_CTX *context;                                                /* context */
{
  unsigned char bits[8];
  unsigned int index, padLen;
 
  /* Save number of bits */
  Encode (bits, context->count, 8);
 
  /* Pad out to 56 mod 64.
   */
  index = (unsigned int)((context->count[0] >> 3) & 0x3f);
  padLen = (index < 56) ? (56 - index) : (120 - index);
  MD5Update (context, PADDING, padLen);
 
  /* Append length (before padding) */
  MD5Update (context, bits, 8);
 
  /* Store state in digest */
  Encode (digest, context->state, 16);
 
  /* Zeroize sensitive information.
   */
  MD5_memset ((POINTER)context, 0, sizeof (*context));
}
 
/* MD5 basic transformation. Transforms state based on block.
 */
static void MD5Transform (state, block)
UINT4 state[4];
unsigned char block[64];
{
  UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
 
  Decode (x, block, 64);
 
  /* Round 1 */
  FF ( a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
  FF ( d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
  FF ( c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
  FF ( b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
  FF ( a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
  FF ( d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
  FF ( c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
  FF ( b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
  FF ( a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
  FF ( d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
  FF ( c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
  FF ( b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
  FF ( a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
  FF ( d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
  FF ( c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
  FF ( b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
 
  /* Round 2 */
  GG ( a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
  GG ( d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
  GG ( c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
  GG ( b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
  GG ( a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
  GG ( d, a, b, c, x[10], S22,  0x2441453); /* 22 */
  GG ( c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
  GG ( b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
  GG ( a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
  GG ( d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
  GG ( c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
  GG ( b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
  GG ( a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
  GG ( d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
  GG ( c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
  GG ( b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
 
  /* Round 3 */
  HH ( a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
  HH ( d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
  HH ( c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
  HH ( b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
  HH ( a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
  HH ( d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
  HH ( c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
  HH ( b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
  HH ( a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
  HH ( d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
  HH ( c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
  HH ( b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
  HH ( a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
  HH ( d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
  HH ( c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
  HH ( b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
 
  /* Round 4 */
  II ( a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
  II ( d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
  II ( c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
  II ( b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
  II ( a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
  II ( d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
  II ( c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
  II ( b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
  II ( a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
  II ( d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
  II ( c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
  II ( b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
  II ( a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
  II ( d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
  II ( c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
  II ( b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
 
  state[0] += a;
  state[1] += b;
  state[2] += c;
  state[3] += d;
 
  /* Zeroize sensitive information.
   */
  MD5_memset ((POINTER)x, 0, sizeof (x));
}
 
/* Encodes input (UINT4) into output (unsigned char). Assumes len is
     a multiple of 4.
 */
static void Encode (output, input, len)
unsigned char *output;
UINT4 *input;
unsigned int len;
{
  unsigned int i, j;
 
  for (i = 0, j = 0; j < len; i++, j += 4) {
    output[j] = (unsigned char)(input[i] & 0xff);
    output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
    output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
    output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
  }
}
 
/* Decodes input (unsigned char) into output (UINT4). Assumes len is
     a multiple of 4.
 */
static void Decode (output, input, len)
UINT4 *output;
unsigned char *input;
unsigned int len;
{
  unsigned int i, j;
 
  for (i = 0, j = 0; j < len; i++, j += 4)
    output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) |
      (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24);
}
 
/* Note: Replace "for loop" with standard memcpy if possible.
 */
static void MD5_memcpy (output, input, len)
POINTER output;
POINTER input;
unsigned int len;
{
  unsigned int i;
 
  for (i = 0; i < len; i++)
    output[i] = input[i];
}
 
/* Note: Replace "for loop" with standard memset if possible.
 */
static void MD5_memset (output, value, len)
POINTER output;
int value;
unsigned int len;
{
  unsigned int i;
 
  for (i = 0; i < len; i++)
    ((char *)output)[i] = (char)value;
}

Je vous remercie d'avance pour votre aide.

**ram-0000** · 21/06/2013, 10h19

En ce qui concerne l'explication, tu la trouveras sur Wiki : http://fr.wikipedia.org/wiki/MD5

En ce qui concerne le passage en C++, le code que tu présentes (issu de la RFC je suppose) est du code C et est donc directement compilable par un compilateur C++. Je ne m'amuserais même pas à changer 1 seule ligne dans ce code sous peine d'introduire des effets de bord qui changeraient le comportement de l'algorithme (un effet de bord est si vite arrivé, promotion d'un signé en non signé par exemple) et je le compilerais tel quel.

**ternel** · 21/06/2013, 10h24

demboz, ce n'est pas du code que tu veux, mais du wikipedia (ou en francais)

**demboz** · 21/06/2013, 11h38

Bonjour,

merci à vous ram et leternel pour le wiki.
ram, vous aviez dit que je pouvais déjà compiler le code sans problème
mais voici les erreurs qu'il m'affiche lors que je le compile.

D’où peut venir l'erreur ?

Encore merci ....

Code :

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Compiler: Default compiler
Executing  gcc.exe...
gcc.exe "C:\Users\YAO\Desktop\md5.c" -o "C:\Users\YAO\Desktop\md5.exe"    -I"C:\Dev-Cpp\include"   -L"C:\Dev-Cpp\lib" 
C:\Users\YAO\Desktop\md5.c:25:17: mdx.h: No such file or directory
C:\Users\YAO\Desktop\md5.c:26:17: md5.h: No such file or directory
C:\Users\YAO\Desktop\md5.c:47: error: syntax error before "PROTO_LIST"
 
C:\Users\YAO\Desktop\md5.c:48: error: syntax error before "PROTO_LIST"
C:\Users\YAO\Desktop\md5.c:49: error: syntax error before "PROTO_LIST"
 
C:\Users\YAO\Desktop\md5.c:50: error: syntax error before "PROTO_LIST"
C:\Users\YAO\Desktop\md5.c:51: error: syntax error before "PROTO_LIST"
 
C:\Users\YAO\Desktop\md5.c:97: error: syntax error before "MD5_CTX"
C:\Users\YAO\Desktop\md5.c:97: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:98: error: syntax error before '{' token
 
C:\Users\YAO\Desktop\md5.c:113: error: syntax error before "MD5_CTX"
C:\Users\YAO\Desktop\md5.c:113: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:116: error: syntax error before '{' token
C:\Users\YAO\Desktop\md5.c:120: warning: built-in function 'index' declared as non-function
 
C:\Users\YAO\Desktop\md5.c:120: error: request for member `count' in something not a structure or union
C:\Users\YAO\Desktop\md5.c:120: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:123: error: syntax error before "if"
C:\Users\YAO\Desktop\md5.c:127: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:127: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:131: error: syntax error before "if"
C:\Users\YAO\Desktop\md5.c:133: error: syntax error before '->' token
C:\Users\YAO\Desktop\md5.c:133: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:138: error: redefinition of 'index'
C:\Users\YAO\Desktop\md5.c:120: error: previous definition of 'index' was here
C:\Users\YAO\Desktop\md5.c:138: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:139: error: syntax error before '}' token
 
C:\Users\YAO\Desktop\md5.c:145: error: syntax error before '(' token
C:\Users\YAO\Desktop\md5.c: In function `MD5Final':
C:\Users\YAO\Desktop\md5.c:153: error: syntax error before "MD5_CTX"
C:\Users\YAO\Desktop\md5.c:159: error: invalid type argument of `->'
C:\Users\YAO\Desktop\md5.c:163: error: invalid type argument of `->'
C:\Users\YAO\Desktop\md5.c:171: error: invalid type argument of `->'
C:\Users\YAO\Desktop\md5.c:175: error: `POINTER' undeclared (first use in this function)
C:\Users\YAO\Desktop\md5.c:175: error: (Each undeclared identifier is reported only once
C:\Users\YAO\Desktop\md5.c:175: error: for each function it appears in.)
C:\Users\YAO\Desktop\md5.c:175: error: syntax error before "context"
C:\Users\YAO\Desktop\md5.c: At top level:
C:\Users\YAO\Desktop\md5.c:181: error: syntax error before "UINT4"
C:\Users\YAO\Desktop\md5.c:181: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:183: error: syntax error before '{' token
C:\Users\YAO\Desktop\md5.c:186: error: syntax error before numeric constant
 
C:\Users\YAO\Desktop\md5.c:186: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:189: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:189: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:189: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:190: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:190: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:190: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:191: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:191: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:191: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:192: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:192: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:192: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:193: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:189: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:193: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:193: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:193: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:194: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:190: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:194: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:194: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:194: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:195: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:191: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:195: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:195: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:195: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:196: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:192: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:196: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:196: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:196: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:197: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:197: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:197: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:197: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:197: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:198: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:198: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:198: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:198: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:198: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:199: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:199: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:199: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:199: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:199: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:200: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:200: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:200: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:200: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:200: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:201: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:197: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:201: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:201: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:201: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:201: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:202: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:198: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:202: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:202: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:202: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:202: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:203: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:199: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:203: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:203: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:203: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:203: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:204: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:200: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:204: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:204: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:204: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:204: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:207: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:201: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:207: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:207: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:207: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:207: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:208: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:202: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:208: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:208: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:208: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:208: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:209: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:203: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:209: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:209: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:209: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:209: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:210: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:204: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:210: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:210: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:210: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:210: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:211: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:207: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:211: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:211: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:211: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:211: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:212: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:208: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:212: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:212: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:212: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:212: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:213: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:209: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:213: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:213: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:213: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:213: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:214: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:210: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:214: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:214: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:214: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:214: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:215: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:211: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:215: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:215: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:215: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:215: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:216: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:212: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:216: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:216: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:216: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:216: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:217: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:213: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:217: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:217: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:217: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:217: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:218: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:214: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:218: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:218: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:218: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:218: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:219: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:215: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:219: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:219: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:219: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:219: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:220: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:216: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:220: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:220: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:220: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:220: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:221: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:217: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:221: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:221: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:221: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:221: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:222: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:218: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:222: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:222: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:222: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:222: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:225: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:219: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:225: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:225: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:225: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:225: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:226: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:220: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:226: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:226: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:226: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:226: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:227: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:221: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:227: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:227: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:227: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:227: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:228: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:222: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:228: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:228: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:228: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:228: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:229: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:225: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:229: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:229: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:229: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:229: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:230: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:226: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:230: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:230: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:230: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:230: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:231: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:227: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:231: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:231: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:231: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:231: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:232: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:228: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:232: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:232: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:232: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:232: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:233: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:229: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:233: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:233: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:233: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:233: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:234: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:230: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:234: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:234: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:234: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:234: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:235: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:231: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:235: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:235: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:235: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:235: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:236: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:232: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:236: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:236: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:236: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:236: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:237: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:233: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:237: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:237: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:237: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:237: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:238: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:234: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:238: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:238: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:238: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:238: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:239: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:235: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:239: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:239: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:239: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:239: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:240: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:236: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:240: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:240: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:240: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:240: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:243: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:237: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:243: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:243: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:243: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:243: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:244: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:238: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:244: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:244: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:244: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:244: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:245: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:239: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:245: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:245: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:245: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:245: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:246: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:240: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:246: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:246: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:246: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:246: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:247: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:243: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:247: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:247: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:247: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:247: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:248: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:244: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:248: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:248: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:248: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:248: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:249: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:245: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:249: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:249: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:249: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:249: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:250: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:246: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:250: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:250: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:250: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:250: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:251: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:247: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:251: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:251: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:251: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:251: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:252: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:248: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:252: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:252: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:252: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:252: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:253: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:249: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:253: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:253: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:253: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:253: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:254: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:250: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:254: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:254: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:254: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:254: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:255: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:251: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:255: error: redefinition of 'a'
C:\Users\YAO\Desktop\md5.c:193: error: previous definition of 'a' was here
C:\Users\YAO\Desktop\md5.c:255: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:255: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:255: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:256: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:252: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:256: error: redefinition of 'd'
C:\Users\YAO\Desktop\md5.c:194: error: previous definition of 'd' was here
C:\Users\YAO\Desktop\md5.c:256: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:256: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:256: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:257: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:253: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:257: error: redefinition of 'c'
C:\Users\YAO\Desktop\md5.c:195: error: previous definition of 'c' was here
C:\Users\YAO\Desktop\md5.c:257: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:257: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:257: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:258: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:254: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:258: error: redefinition of 'b'
C:\Users\YAO\Desktop\md5.c:196: error: previous definition of 'b' was here
C:\Users\YAO\Desktop\md5.c:258: error: initializer element is not constant
C:\Users\YAO\Desktop\md5.c:258: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:258: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:260: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:261: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:262: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:263: error: syntax error before '+=' token
C:\Users\YAO\Desktop\md5.c:267: error: syntax error before '(' token
C:\Users\YAO\Desktop\md5.c:274: error: conflicting types for 'Encode'
 
C:\Users\YAO\Desktop\md5.c:159: error: previous implicit declaration of 'Encode' was here
C:\Users\YAO\Desktop\md5.c: In function `Encode':
C:\Users\YAO\Desktop\md5.c:275: error: syntax error before "UINT4"
C:\Users\YAO\Desktop\md5.c:281: error: subscripted value is neither array nor pointer
C:\Users\YAO\Desktop\md5.c:282: error: subscripted value is neither array nor pointer
 
C:\Users\YAO\Desktop\md5.c:283: error: subscripted value is neither array nor pointer
C:\Users\YAO\Desktop\md5.c:284: error: subscripted value is neither array nor pointer
C:\Users\YAO\Desktop\md5.c: At top level:
C:\Users\YAO\Desktop\md5.c:292: error: syntax error before "UINT4"
C:\Users\YAO\Desktop\md5.c:292: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:295: error: syntax error before '{' token
C:\Users\YAO\Desktop\md5.c:306: error: syntax error before "POINTER"
 
C:\Users\YAO\Desktop\md5.c:306: error: conflicting types for 'output'
C:\Users\YAO\Desktop\md5.c:292: error: previous declaration of 'output' was here
C:\Users\YAO\Desktop\md5.c:306: warning: data definition has no type or storage class
 
C:\Users\YAO\Desktop\md5.c:307: error: syntax error before "input"
C:\Users\YAO\Desktop\md5.c:307: error: conflicting types for 'input'
C:\Users\YAO\Desktop\md5.c:293: error: previous declaration of 'input' was here
C:\Users\YAO\Desktop\md5.c:307: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:309: error: syntax error before '{' token
C:\Users\YAO\Desktop\md5.c:319: error: syntax error before "POINTER"
C:\Users\YAO\Desktop\md5.c:319: warning: data definition has no type or storage class
C:\Users\YAO\Desktop\md5.c:322: error: syntax error before '{' token
 
Execution terminated

**koala01** · 21/06/2013, 12h33

Salut,

Ca, c'est "simplement" un problème de configuration de ton projet...

Lorsque tu te retrouves avec une flopée d'erreurs de compilation, ce qui importe surtout, ce sont les quelques premières erreur (souvent la première, parfois les deux premières, rarement les trois premières).

Toutes les erreurs suivantes sont souvent induites par cette (ces) erreurs essentielles.

Dans ton cas, toutes tes erreurs sont induites par les deux premières à savoir:

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

1
2
C:\Users\YAO\Desktop\md5.c:25:17: mdx.h: No such file or directory
C:\Users\YAO\Desktop\md5.c:26:17: md5.h: No such file or directory

Autrement dit: g++ n'arrive pas à trouver mdx.h et md5.h, sans doute parce que tu auras mis ces deux fichiers dans un dossier spécifique, qu'il te faut spécifier avec l'option -I (i majuscule).

Nota: apparemment, tu utilise dev-cpp comme EDI. Cet environnement de développement intégré était excellent à l'époque, mais il n'est plus maintenu depuis malheureusement fort longtemps.

Je te conseillerais volontiers de t'orienter vers un environnement plus récent, comme Code::blocks, par exemple

Où trouver une implémentation MD5 en C++?

C++

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