为什么在我包括cin.get（）后控制台关闭？ [英] Why is the Console Closing after I've included cin.get()?

问题描述

我刚刚开始学习C ++使用C ++ Primer Plus，但我有一个例子的麻烦。像书指示，我包括 cin.get（）在结束，以防止控制台自身关闭。但是，在这种情况下，它仍然关闭，除非我添加两个 cin.get（）语句，我不明白。我正在使用Visual Studio Express 2010.

I've just started learning C++ using C++ Primer Plus but I'm having trouble with one of the examples. Like the book instructed I included cin.get() at the end to prevent the console from closing by itself. However, in this instance it still closes by itself unless I add two cin.get() statements which I don't understand. I'm using Visual Studio Express 2010.

#include <iostream>

int main()
{
    int carrots;

    using namespace std;
    cout << "How many carrots do you have?" << endl;
    cin >> carrots;
    carrots = carrots + 2;
    cout << "Here are two more. Now you have " << carrots << " carrots.";
    cin.get();
    return 0;
}

推荐答案

cin >> carrots;

此行在输入流中留下尾随的换行符，然后由下一个 cin.get（）。只需在之前直接执行一个简单的 cin.ignore（）：

This line leaves a trailing newline token in the input stream, which then gets consumed by the next cin.get(). Just do a simple cin.ignore() directly before that:

cin.ignore();
cin.get();

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