C++语言开发示例：15. 输入数字

#include <iostream>

int main()
{
    using namespace std;
    cout << "\aOperation\"HyperHype\" is now activated!\n";
    cout << "Enter your agent code:________\b\b\b\b\b\b\b\b";
    long code;
    cin >> code;
    cout << "\aYou entered " << code << "...\n";
    cout << "\aCode verified! Proceed with Plan Z3!\n";
}