Question

我正在尝试编写一个类似游戏的冒险程序，我需要if else语句才能正常工作。但是，每当我运行if if语句时，它都不会输出我想要的内容。

#include <iostream>

using namespace std;

int main()
{
    while(true)
    {
        cout << endl << "What will you do?: ";
        string input;
        cin >> input;
        if (input == "Nothing" || input == "nothing")
            {
                cout << "Why would you do nothing?" << endl;
            }
            else if (input == "Look North" || input == "Look north" || input == "look North" || input == "look north")
            {
                cout << "You look north. There is nothing north." << endl;
            }
    }
}

我期望输出的是：

What will you do?: nothing
Why would you do nothing?

What will you do?: look north
You look north. There is nothing north.

What will you do?:

但是当我把这些作为输入时，我没有得到它，我得到了这个：

What will you do?: nothing
Why would you do nothing?

What will you do?: look north

What will you do?:
What will you do?:

我想帮助解决这个问题，因为我无法找到解决这个问题的原因。

Answer 1

cin >> input;

不会读取空格。您需要使用std::getline。

getline(cin, input);

Answer 2

因为当你输入＆＃34;向北看＆＃34; 运用 CIN＆GT;＆GT;输入; 只有＆＃34;看＆＃34;保存到输入变量..

Answer 3

问题在于cin语句，因为它不处理空格，请尝试发布here。此外，您会发现有助于tolower()功能，以规范您的输入。

C ++ if / else if语句无法正常工作

3 个答案: