如何修复在 C++ 中已经定义的 -main? [英] How do I fix already defined -main in c++?

问题描述

我没有编程方面的背景知识，只有在学校学习过一点 html 编码.我从 2 天前开始学习 C++，目前正在学习输入和输出流，甚至还不了解调试.我启动了一个 Visual Studio 项目并编写了第二个程序，简单的 hello world，就像第一个一样.但这一次发生了错误，_main 已经在第一个程序的 .obj 中定义.这是什么意思，有什么问题，我该如何应对并继续工作?错误 LNK2005 _main我查看了错误代码，什么也不懂，更不用说找出如何修复它了.请简单回答.提前致谢

I have no background knowledge about programming, only experience I have is a little html coding in school. I literally started 2 days ago learning c++ and currently learning input and output streams, don't even understand debugging yet. I started a Visual Studio Project and wrote a second program, simple hello world, just like in the first. But this time, error occurred, _main is already defined in the .obj of the first program. What does this mean, what is the problem, how can I counter it and keep on working? Error LNK2005 _main I looked up the error code and understood nothing let alone found out how to fix it. Easy answers please. Thanks in advance

程序:

#include "pch.h"
#include <iostream>

using namespace std;

int main() {
    cout << "Hello World2" << endl;
    return 0;
}

推荐答案

如果您的 Visual Studio 项目中有两个文件 (.cpp)，每个文件都包含一个 main 或 _tmain 函数，链接将失败，因为只能定义一个 main 函数.

If you have two files (.cpp) in your visual studio project each containing a main or _tmain function, link will fail because there can only be one main function defined.

重命名所有其他 main 函数，你会没事的.

Rename all other main function and you'll be fine.

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