帮孩子纠下错吧

#include <bits/stdc++.h>
using namespace std;
int main(){
    int L,cnt=2,b=0,sum=1;
    cin >> L;
    cout << 2 << endl;
    for (int x=3;cnt<=L;x+=2){
        for (int y=3;y<x;y+=2)
            if (x%y==0)
                b=1;
        if (b==1){
            cnt+=x;
            sum+=1;
            cout << x << endl;
        }
    }
    cout << sum;
    return 0;
}