c++ - 如果用户输入 "q"，程序退出

Question

我有这个 C++ 代码，我正在尝试执行以下操作:

提示用户输入“p”播放或“q”退出，如果用户输入任何“p”程序将继续，如果用户输入“q”程序将终止，如果他们输入无效输入，它也会终止。我该怎么做？

谢谢，

代码如下:

#include <iostream>
#include <cstdio>
#include <cmath>

using namespace std;

int Umain = 0;
double Atemp = 0;
double Utemp = 0;
double Working = 0;
double Total = 0;
char Answer = 'x';

void displayOverview ();

void playOrQuit();    

void promptNumber();

int main(){

    displayOverview();

    playOrQuit();

    promptNumber();

    return 0;
}

void displayOverview(){


}

void playOrQuit(){

    string playOrNot;

    cout << "If you want to play please press 'p' for play, and 'q' if you wish to quit\n";
    cin >> playOrNot;

    if(playOrNot == "p"){
        cout << "Awesome, lets start playing !!! \n";

    }if(playOrNot == "q"){
        cout << "Alright then, see you soon !!\n";

    }
}


void promptNumber(){

    do{
    cout << "Please Enter numbers between 1 and 12: ";
    cin >> Umain;
    cout << "\n";
        for (Utemp = Umain; Utemp > 0; Utemp--)
        {
            cout << "Please enter a number: ";
            cin >> Atemp;
            Working = (Working + Atemp);
        }
    }while (Answer == 'y');
}

Answer 1

只需在检测到“q”被按下后添加对 exit 的调用:

}if(playOrNot == "q"){
    cout << "Alright then, see you soon !!\n";
    exit(0); // <=== Add this here

传统上以 0 退出意味着程序以预期的方式退出并且没有任何错误。