易百教程

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int rnd(void);
void seedrnd(void);
int main()
{
   int x;
   seedrnd();
   puts("Behold! 100 Random Numbers!");
   for(x=0;x<20;x++)
      printf("%d\t",rnd());
    printf("\n=============================\n");
   return(0);
}
int rnd(void)
{
   int r;
   r=rand();
   return(r);
}
/* seed the random number */
void seedrnd(void)
{
   srand((unsigned)time(NULL));
}