C++ Primer Plus 代码学习解析（第六章 6.4-6.5）

6.4 or.cpp

#include <iostream>
int main()
{
    using namespace std;
    cout << "This program may reformat your hard disk\n"
        "and destroy all your data.\n"
        "Do you wish to continue? <y/n> ";
    char ch;
    cin >> ch;
    if (ch == 'y' || ch == 'Y')             // y or Y
        cout << "You were warned!\a\a\n";
    else if (ch == 'n' || ch == 'N')        // n or N
        cout << "A wise choice ... bye\n";
    else
        cout << "That wasn't a y or n! Apparently you "
        "can't follow\ninstructions, so "
        "I'll trash your disk anyway.\a\a\a\n";
    // cin.get();
    // cin.get();
    return 0;
}

1. 该代码展示了C++中or的应用，与C相同，与条件判断相配合