@all +tabstop

Could you please tell me how many cores was the PC that u used to run the program with the gaussian number generator that run at your PC but not at mine? I am still trying to find out why it doesn't go through GENER01.c when I compile it. While you take warnings for the GENER01.c code I am not taking anything for this and take only for the gauss2.c and check.c the same as yours.

At everyone:
Could you please try to compile this code and run it by
gcc -o check -Wall -Wextra gauss2.c GENER01.c check.c

GENER01.c

Code:

#include <stdio.h>
#include<math.h>
#define znew (z=36969*(z&65535)+(z>>16))
#define wnew (w=18000*(w&65535)+(w>>16))
#define MWC ((znew<<16)+wnew )
#define SHR3 (jsr^=(jsr<<17), jsr^=(jsr>>13), jsr^=(jsr<<5))
#define CONG (jcong=69069*jcong+1234567)
#define FIB ((b=a+b),(a=b-a))
#define KISS ((MWC^CONG)+SHR3)
#define LFIB4 (c++,t[c]=t[c]+t[UC(c+58)]+t[UC(c+119)]+t[UC(c+178)])
#define SWB (c++,bro=(x<y),t[c]=(x=t[UC(c+34)])-(y=t[UC(c+19)]+bro))
#define UNI (KISS*2.328306e-10)
#define VNI ((long) KISS)*4.656613e-10
#define UC (unsigned char) /*a cast operation*/
typedef unsigned long UL;
/* Global static variables: */
static UL z=362436069, w=521288629, jsr=123456789, jcong=380116160;
 static UL a=224466889, b=7584631, t[256];
/* Use random seeds to reset z,w,jsr,jcong,a,b, and the table
t[256]*/
/*static UL x=0,y=0,bro; static unsigned char c=0;*/
/* Example procedure to set the table, using KISS: */
void settable(UL i1,UL i2,UL i3,UL i4,UL i5, UL i6)
{ int i; z=i1;w=i2,jsr=i3; jcong=i4; a=i5; b=i6;
for(i=0;i<256;i=i+1) t[i]=KISS;
}

int Threepoint(){
  return(KISS%3);
}
int Eightpoint(){
  return(KISS%8);
}
int Fourpoint(){
  return(KISS%4);
}

double GENER02(double lambda){
  /* lambda > 0 */
  /* 
     function is a translation from P.E. Kloeden E. Platen and H. Schurz 
     Numerical Solution of SDE Trough Computer experiments, Springer 1994.
     page 11.
  */
  double xu;
  double Uniform();
  xu=Uniform();
  if(xu>0.0)
    xu=-log(xu)/lambda;
  else
    xu=0.0;
  return(xu);
}     

double Uniform(){
  return((double) UNI);
}

double GENER01(double sqrtDT){
  /*  *WT=-sqrtDT+2*(KISS%2)*sqrtDT; */
  if(KISS%2)
    return(-sqrtDT);
  else
    return(sqrtDT);
}

double GENER03(double sqrt3DT){
  long I;
  double Y;
  /* generate a random variable on set {1,2,3,4,5,6} with uniform prob. */

  I = KISS%6+1; /* six point random variable 1, 2,...,6.
		   Each element prob. 1/6 */
  if(I>2) /* prob. 2/3 */
    Y=0.0;
  else{
    if(I==1) /* prob. 1/6 */
      Y=-sqrt3DT;
    else    /* prob. 1/6 */
      Y=sqrt3DT;
  }
  /*  printf("%g  %d\n",Y,I); */
  /*  printf("%g\n",Y); */
  return( Y );
}

gauss2.c

Code:

#include<math.h>

/* Polar Marsaglia method for gaussian dist. pseudo-random no.generator*/

void gauss2(double *z1,double *z2){
  double y, v1, v2,r, fac;
  double Uniform();
  r=100.0;
  while(r>1.0 || r<=0.0){
    y=Uniform();     /* rand. no [0:1] */
    v1 = 2.0*y - 1.0;                /* rand. no [-1:1] */
    y=Uniform();
    v2 = 2.0*y - 1.0;                /* rand. no [-1:1] */
    r = v1 * v1 + v2 * v2; 
    }
  fac = (sqrt( -2.0*log(r) / r));
  *z1 = v1 * fac;
  *z2 = v2 * fac; 
  return;
}

check.c

Code:

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <math.h>
typedef unsigned long UL;
#define pi 3.14159
double Uniform();
void gauss2(double *z1,double *z2);


int main()

{

  int i;
  int j=100;

 double z1, z2;

 UL i1, i2,i3,i4,i5,i6; /* to initialize Uniform (AND gauss2) */
    i1=time(NULL); i2= i1+23;i3= i1+243;i4= i1+26;i5= i2+28;i6= i1+27;
  settable(i1,i2,i3,i4,i5,i6);

    for(i=0;i<j;i++)
      {
	printf("OK\n");
  gauss2(&z1,&z2);
  printf("%lf",z1);
printf("ok\n"); 
     }
}

I would appreciate to give some feedback about this situation

for those who have -32 architecture have to add -m32 to compile