srand zoves samo jedanput kao generator da ti ne bi svaki poziv
rand generisao istu sekvencu.
/* RAND.C: This program seeds the random-number generator
* with the time, then displays 10 random integers.
*/
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
void main( void )
{
int i;
/* Seed the random-number generator with current time so that
* the numbers will be different every time we run.
*/
srand( (unsigned)time( NULL ) );
/* Display 10 numbers. */
for( i = 0; i < 10;i++ )
printf( " %6d\n", rand() );
}
primer za rand
/* getrandom returns a random number between min and max, which must be in
* integer range.
*/
#define getrandom( min, max ) ((rand() % (int)(((max) + 1) - (min))) + (min))
jos jedan
// return an integral random number in the range 0 - (n - 1)
int Rand(int n)
{
return rand() % n ;
}
jos jedan
RGB (rand () % 256, rand () % 256, rand () % 256)
znaci brojevi su izmedju 0 i 255
pozdrav od Borisa