/*
 * Try to use rand() to mimic random() behaviour
 * Test for uniform distribution of values
 *
 * With TOP=100 you get 20893 rand() results you should discard
 * (out of 10000000)
 */

#include <stdio.h>
#include <stdlib.h>
#define TOP	100
#define N	100000
#define TRIES	TOP*N

int v[TOP];

int my_random(int n);
int main(int arch, char **argv)
{

	int i,j;
	int c1, c2;
	int gc=0, gn=0;


	for( i=0; i < TRIES; i++)
	{
		v[my_random(TOP)]++;
	}
	for( i=0; i < TOP; i++)
	{
		printf("%0.2d\t%d\t%f\n",i,v[i], (float)v[i]/N);
	}
	return 0;
}

/* return values so 0 <= x < n */
#if defined(TRIM)
int my_random(int n)
{
	int value,aux;

	if((n<=0)||(n>RAND_MAX)) return(-1);
	aux= RAND_MAX - ( RAND_MAX % n + 1 ) % n;

	do
		value=rand();
	while( value > aux);


	return(value%n);
}
#elif defined(MOD)
int my_random(int n)
{
	return ( rand() % n); 
}
#endif