Extraire d'un fichier.h des variables static ?

#include <math.h> //double randgen(unsigned long ran[3]) double randgen(void);/* This generates a random number uniformly distributed between 0 and 1 */ int randint(int lo, int hi); /* This generates a random integer uniformly distributed among the set { lo, lo+1,...., hi-1,hi} */ /* This line initialises the seeds of randgen (it requires three). Change one or more of the three seed integers to get a new random number sequence. This line should appear only once in your code. */ static unsigned long ranx=1,rany=1,ranz=1; /* Randgen returns a double value uniformly distributed between 0 and 1. It uses three integer seeds (ranx, rany and ranz) */ void getRanx(unsigned long ran[3]) { ran[0]=ranx; ran[1]=rany; ran[2]=ranz; } double randgen(void) { double register random; ranx = (171*ranx)%30269; rany = (172*rany)%30307; ranz = (170*ranz)%30323; random = ranx/30269.0+rany/30307.0+ranz/30323.0; // Discard value (max = 2) to left of decimal point while(random>1.0) random -= 1.0; return random; }

Citation:

Envoyé par Battosaiii

Bonjour
je voudrais extraire ranx rany ranz de la fonction rangen() a un moment donne dans mon programme principal.
Pour ce faire j'ai realise void getRanx(unsigned long ran[3]). Malheuresuement au bout de n executions de rangen() j'obtiens :

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ran[0]=-243427912796356787233568133420600566504719800000000000000000000000000000
00000000000000000000.000000ran[1]=-243427912796647823412860550345535498202352600
00000000000000000000000000000000000000000000000.000000ran[2]=-243427912796025766
59846095574693343295132620000000000000000000000000000000000000000000000000.00000
0

Probablement un problème de printf(). Ceci fonctionne :

Code:

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#include <math.h>
 
/* This generates a random number uniformly distributed between 0 and 1 */
double randgen(void);
 
/* This line initialises the seeds of randgen (it requires three). Change one or more of
the three seed integers to get a new random number sequence.
 
This line should appear only once in your code. */
 
static unsigned long ranx = 1, rany = 1, ranz = 1;
 
/* Randgen returns a double value uniformly distributed between 0 and 1. It uses three integer
seeds (ranx, rany and ranz) */
 
double randgen(void)
{
   double register random;
 
   ranx = (171 * ranx) % 30269;
   rany = (172 * rany) % 30307;
   ranz = (170 * ranz) % 30323;
 
   random = ranx / 30269.0 + rany / 30307.0 + ranz / 30323.0;
   // Discard value (max = 2) to left of decimal point
   while (random > 1.0)
      random -= 1.0;
 
   return random;
}
 
#include <stdio.h>
 
int main (void)
{
   int i;
   for (i = 0; i < 10; i++)
   {
      printf ("x = %f\n", randgen());
   }
   return 0;
}

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x = 0.016931
x = 0.895254
x = 0.111491
x = 0.939527
x = 0.128230
x = 0.178004
x = 0.299827
x = 0.349718
x = 0.059287
x = 0.821979