c++ - c ++输入流不等待提取运算符重载的输入

Question

这个问题让我很烦。它不等待输入，而是关闭。我一直试图弄清楚这一点。有任何想法吗？

    istream& operator>>(istream& is, Account &a) {
    cout << "Enter an accoutn number: ";
        is >> a.accountNo;
        cout << endl;
    cout << "Balance: ";
        is >> a.bal;
    return is;
    }

Answer 1

当我将它放入以下程序时，它运行良好（尽管如果您尝试从除std::cin.

#include <iostream>

struct Account { 
    int accountNo;
    int bal;
};

using std::ostream;
using std::istream;
using std::cout;
using std::endl;

istream& operator>>(istream& is, Account &a) {
    cout << "Enter an account number: ";
    is >> a.accountNo;
    cout << endl;
    cout << "Balance: ";
    is >> a.bal;
    return is;
}

ostream &operator<<(ostream &os, Account const &a) { 
    return os << "Account #: " << a.accountNo << "\tBalance: " << a.bal;
}

int main() { 
    Account a;
    std::cin >> a;

    std::cout << a;
    return 0;
}