Mathc matrices/Fichiers h : z s

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	z_r.h

/* ------------------------------------ */
/*  Save as :   z_r.h                   */
/* ------------------------------------ */

/* ------------------------------------ 
  Call :  time_t t;                                                            
            int i;                                                            
                                                                              
         srand(time(&t)); 
                                                             
            i = r_I(9);                                                    
   ------------------------------------ */
   
/* ------------------------------------ 
    positive and negative numbers without zero
   ------------------------------------ */
int r_I(
int maxI)
{
int x;

    x  = (rand() % maxI) + 1; /* + 1 : not zero */
    x *=  pow(-1,rand());

 return(x);
}
/* ------------------------------------ 
    positive numbers without zero
   ------------------------------------ */
int rp_I(
int maxI)
{
 return((rand() % maxI) + 1);  /* + 1 : not zero */
}
/* ------------------------------------ 
    positive and negative numbers  with zero
   ------------------------------------ */
int r0_I(
int maxI)
{
int x;

     x = rand()%maxI;
    
    if(x) x*=pow(-1,rand());

 return(x);
}
/* ------------------------------------ 
    positive numbers  with zero
   ------------------------------------ */
int rp0_I(
int maxI)
{
 return(rand() % maxI);
}
/* ------------------------------------ */
/* ------------------------------------ */


/* ------------------------------------ */
/* ------------------------------------ 
    positive and negative floating point number without zero
 
    e=  1E-0  -> 1234
    e = 1E-1  ->  123.4
    e = 1E-2  ->   12.34
    e = 1E-3  ->    1.234
   ------------------------------------ */
double r_E(
int maxI,
double e)
{
double x;

    x  = (rand() % maxI) + 1 ; /* + 1 : not zero */
    x *=  pow(-1,rand()) * e;

 return(x);
}
/* ------------------------------------ */ 
/* ------------------------------------ 
    positive and negative floating point number with zero
    
    e=  1E-0  -> 1234
    e = 1E-1  ->  123.4
    e = 1E-2  ->   12.34
    e = 1E-3  ->    1.234
   ------------------------------------ */
double r0_E(
int maxI,
double e)
{
double x;

    x  = (rand() % maxI); 
    x *=  pow(-1,rand()) * e;

 return(x);
}
/* ------------------------------------ */ 
/* ------------------------------------ 
    positive floating point number without zero
    
    e=  1E-0  -> 1234
    e = 1E-1  ->  123.4
    e = 1E-2  ->   12.34
    e = 1E-3  ->    1.234
   ------------------------------------ */
double rp_E(
int maxI,
double e                       /*  1E-1  1E-0  1E+1 */
)
{
double x;

    x  = (rand() % maxI) + 1 ; /* + 1 : not zero */
    x *=  e;

 return(x);
}
/* ------------------------------------ */
/* ------------------------------------ */

Nous allons utiliser ses fonctions pour donner des valeurs aléatoires aux matrices.