vc6++输入为啥没有执行？

Question

#include <iostream>
using namespace std;

int main() {
    std::cout << "Hello World!\n";
    cout<<"my name is jone\n";
    cout<<2<<endl;    
    int i;float f;long l;
    cin>>i>>f>>l;
    cout<<i<<endl<<f<<endl<<l<<endl;
}

Answer 1

有什么问题？