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c++ - How to make void not return when answer == true

问题描述

I made this program and when I type "yes" it should end my program instead it's waiting for me to say something more and then it comes with my void nottrue(); what should I do to avoid this? Here's my code

#include <iostream>

using namespace std;

void CharacterWorld();
void nottrue();

int main()
{
    CharacterWorld();
    nottrue();
    return 0;
}

void CharacterWorld()
{
    string CharacterName;
    int CharacterAge;
    string yesorno;
    cout << " Hi, welcome to the Vanish World! " << endl;
    cout << " What's your name champion? " << endl;
    cin >> CharacterName;
    cout << " ...And what's your age? " << endl;
    cin >> CharacterAge;
    cout << " ... So your name is " << CharacterName << " and your age is " << CharacterAge << " Is that right?" << endl;
    cin >> yesorno;
    if (yesorno == "yes")
    {
        cout << " Okey! so let's start your journey champion!" << endl;
    }
    else
    {
        cout << " SO what's your name then ??" << endl;
        return nottrue();
    }
}

void nottrue()
{
    string CharacterName;
    int CharacterAge;
    string yesorno;
    cin >> CharacterName;
    cout << " and what's your age?" << endl;
    cin >> CharacterAge;
    cout << " ...Okey, already. Your name is " << CharacterName << " and your age is " << CharacterAge << endl;
}

标签： c++if-statementreturnmainvoid

解决方案

虽然return nottrue()可以工作，但它只是一个函数调用，因为调用者和被调用函数都没有返回值。你不会以任何方式改变流量。您必须将函数返回的结果用于控制流。例如

bool CharacterWorld()
{
    //...
    if (yesorno == "yes")
    {
        cout << " Okey! so let's start your journey champion!" << endl;
        return true;
    }
    else
    {
        cout << " SO what's your name then ??" << endl;
        return false;
    }
}

int main()
{
    if(!CharacterWorld())
        nottrue();
    return 0;
}

还有预定义的exit()功能来退出程序。

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