C中的嵌套循环

#include <stdio.h>



int main () {



   /* local variable definition */

   int i, j;



   for(i = 2; i<100; i++) {



      for(j = 2; j <= (i/j); j++)

      if(!(i%j)) break; // if factor found, not prime

      if(j > (i/j)) printf("%d is prime\n", i);

   }



   return 0;

}