srand : srand « stdlib.h « C Tutorial

1. C Tutorial
2. stdlib.h
3. srand

#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;
  }

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