#include <iostream>
int main(){
int i,j;
for (i=2; i<1000; i++){
for(j=2;j <=(i/j); j++)
// if i mode j is ture, break
if (!(i%j)) break;
if(j> (i/j))
// write out prime
std:: cout<<i<<std::endl;
}
}
原文：https://www.cnblogs.com/poission/p/10847991.html