C Tutorial/stdlib.h/srand

srand

Item Value Header file stdlib.h Declaration void srand(unsigned int seed); Function sets a starting point for the sequence generated by rand(). Return returns pseudorandom numbers.

<source lang="cpp">#include <stdio.h>

 #include <stdlib.h>
 #include <time.h>
 int main(void)
 {
   int i, stime;
   long ltime;
   /* get the current calendar time */
   ltime = time(NULL);
   stime = (unsigned) ltime/2;
   srand(stime);
   for(i=0; i<10; i++) printf("%d ", rand());
   return 0;
 }</source>