素数

#include "stdio.h"
void main (){
    int i,j;
    for ( i = 2; i <= 100; i++)
    {
        j = 2;
        while(j<=i/2){
            if(i%j == 0)
                break;
            else
                j++;
        }
        if(j>i/2)
             printf(" %d ",i);
    }

}