Discussion :

[Batou]

Bonjour,

Je commence a programmer un petit programme avec seulement 2 classes, et un main. Cependant, ca ne marche pas.
Sous Eclipse, les erreurs qui apparaissent sont :

A syntax error in expression, near `::__ioinit'.
mi_cmd_var_create: unable to create variable object
whatis fData::memory
A syntax error in expression, near `memory'.
A syntax error in expression, near `memory'.
mi_cmd_var_create: unable to create variable object

Les grosses lignes de mon code sont :

Code :

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#include <stdio.h>
#include <windows.h>
#include <string>
#include <iostream>
#include "MF.h"
using namespace std;
using std::string;
 
class fMemory {
 public:
  unsigned char bytememory[64];
  unsigned int frontindex; // to store all data except signs at the beginning of chip
  unsigned int backindex; // to store signs at the end of chip
  unsigned int availablebit;
  bool memoryexceeded;
  fMemory();
  unsigned char * getByteMemory();
  void setByteMemory(unsigned char * b);
  void initializeByteMemory();
  bool getBit(unsigned int byteI, unsigned int bitI);
  void setBit(unsigned int byteI, unsigned int bitI, bool b);
  friend class fData;
};
 
fMemory::fMemory() {
  frontindex = 0;
  backindex = 63;
  availablebit = 0;
  memoryexceeded = false;
}
 
void connectF(unsigned char * bytememory, char * arg, unsigned char * b) {
...
}
 
unsigned char * fMemory::getByteMemory() {
...
}
 
void fMemory::setByteMemory(unsigned char * b) {
...
}
 
void fMemory::initializeByteMemory() {
...
}
 
bool fMemory::getBit(unsigned int byteI, unsigned int bitI) {
...
}
 
void fMemory::setBit(unsigned int byteI, unsigned int bitI, bool b) {
...
}
 
class fData {
  static fMemory * memory; // the memory allocated for ALL the data
  unsigned int dataindex; // the place of the first byte
  unsigned int signbyteindex; // byte where the sign is stored
  unsigned int signbitindex; // byte's bit where the sign is stored
  unsigned int usedbytes; // number of bytes used
  bool readwrite; // allow the reading/writing
 public:
  fData(string, string);
  unsigned char * getValue();
  void setValue(unsigned char *);
  bool getSign();
  void setSign(bool);
  unsigned char * numberToBytes(long);
  long bytesToNumber(unsigned char *);
  void modifyValue(string, fData *);
  friend ostream& operator<<(ostream&, fData);
};
 
fMemory * fData::memory;
 
fData::fData(string dt, string rw) {
  // make data reference equal to reference
  if (dt == "short")
    if ((2 + memory->frontindex) < memory->backindex)
      usedbytes = 2;
    else
      throw "memory exceeded";
  else if (dt == "int")
    if (4 + memory->frontindex < memory->backindex)
      usedbytes = 4;
    else
      throw "memory exceeded";
  else if (dt == "long")
    if (8 + memory->frontindex < memory->backindex)
      usedbytes = 8;
    else
      throw "memory exceeded";
  dataindex = memory->frontindex;
  memory->frontindex += usedbytes; // to slide the back index for next data
  // allow RW or not
  if (rw == "RW")
    readwrite = true;
  else
    readwrite = false;
  // store the sign at the end of the chip
  signbyteindex = memory->backindex;
  signbitindex = memory->availablebit;
  memory->availablebit++;
  if (memory->availablebit == 4) {
    memory->backindex--;
    memory->availablebit = 0;
  }
}
 
unsigned char * fData::getValue() {
...
}
 
void fData::setValue(unsigned char * v) {
...
}
 
bool fData::getSign() { // true = "<0", false = ">0"
...
}
 
void fData::setSign(bool s) { // true = "<0", false = ">0"
...
}
 
long fData::bytesToNumber(unsigned char * b) {
...
}
 
unsigned char * fData::numberToBytes(long v) {
...
}
 
void fData::modifyValue(string operation, fData * f) {
...
}
 
ostream& operator<<(ostream &o, fData fd) {
...
}
 
int main (int argv, char *argc[]) {
  fData * d = new fData("int", "rw");
  cout << "this is a fData: " << d << "\n";
  printf( "Press key.\n" );
  getchar();
  printf("test ok!\n");
  return EXIT_SUCCESS;
}

Je continue a chercher, mais si un expert pouvait m'eclairer, ca irai plus vite !



Merci d'avance,
Batou

[Batou]

En modifiant 2 lignes, ca marche !

Code :

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fMemory * fData::memory = new fMemory();

Code :

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1
2
 public:
  static fMemory * memory; // the memory allocated for ALL the data

(avant il etait prive)

[Matthieu Brucher]

Normal