c++求助

#include<bits/stdc++.h>
using namespace std;
int flag = 0;
void work(int x){
	for(int i = 2;i <= x;++i){
		if(x % i == 0){
			flag = 1;
		}
	}
	//cout << flag << " ";
	if(flag == 0){
		cout << x << " ";
	}
}
int main(){
	int n;
	cin >> n;
	for(int i = 1;i <= n;++i){
		int x;
		cin >> x;
		work(x);
	}
	return 0;
}