C库函数 srand()

#include <stdio.h>

#include <stdlib.h>

#include <time.h>



int main () {

   int i, n;

   time_t t;

   n = 5;



   /* Intializes random number generator */

   srand((unsigned) time(&t));



   /* Print 5 random numbers from 0 to 50 */

   for( i = 0 ; i < n ; i++ ) {

      printf("%d\n", rand() % 50);

   }



   return(0);

}