C++开关语句结束菜单

Question

嘿,我正在为我的C++编程类开发一个Switch选择菜单.我设法让我的菜单工作,但我不知道如何在我所做的菜单中的退出选择上停止程序.

我的代码是

#include <iostream>
using namespace std;

int main()
{
    char selection;

    do
    {
        cout << "  IHCC Computer Science Registration Menu\n";
        cout << "  ====================================\n";
        cout << "  1.  Welcome to Computer Programming In C++\n";
        cout << "  2.  Welcome to Java Programming\n";
        cout << "  3.  Welcome to Android Programming\n";
        cout << "  4.  Welcome to iOS Programming\n";
        cout << "\n";
        cout << "  5.  Exit\n";
        cout << "  ====================================\n";
        cout << "  Enter your selection: ";
        cin >> selection;
        cout << endl;

        switch (selection)
        {
            case '1':
                cout << "Computer Programming In C++\n";
                cout << "\n";
                break;

            case '2':
                cout << "Java Programming\n";
                cout << "\n";
                break;
            case '3':
                cout << "Android Programming\n" ;
                cout << "\n";
                break;

            case '4':
                cout << "iOS Programming\n";
                cout << "\n";
                break;

            case '5':
                cout << "Goodbye.\n";
                break;

            default: cout <<selection << "is not a valid menu item.\n";

                cout << endl;
        }

    }while (selection != 0 );

    return 0;
}

Answer 1

更改

while (selection != 0)

至:

while (selection != '5')

另请注意,您当前的方法仅读取单个字符.如果您不希望具有更多数字的数字根据其第一个数字调用选择,请int改为阅读:

int selection = 0;

do {

    cout << ...        
    cin >> selection;

    switch (selection) {
        case 1:
            ...
            break;
        ...
        case 5:
            cout << "Goodbye.\n";
            break;

        default:
            ...
    }

} while (selection != 5);