在 C++ 程序中使用多个 .cpp 文件?

问题描述

我最近从 Java 转向 C++，但是现在当我编写应用程序时，我对在 main 函数中编写所有代码不感兴趣，我希望在 main 函数中调用另一个函数，但另一个函数在另一个 .cpp 文件.

I recently moved from Java for C++ but now when I am writing my application I'm not interested in writing everything of the code in the main function I want in main function to call another function but this other function is in another .cpp file.

如果你不明白，让我解释得更好:
我有一个文件:main.cpp 里面有 main 函数.

Let me explain better if you wouldn't understand:
I have one file: main.cpp inside it I have main function.

我有第二个文件:second.cpp 里面我有一个名为 second() 的函数我想调用这个名为 second() 的函数代码>来自我的主要功能..

I have the second file: second.cpp inside I have a function called second() I want to call this function called second() from my main function..

有什么帮助吗?

推荐答案

您必须使用称为标题"的工具.在标头中声明要使用的函数.然后将其包含在两个文件中.标头是使用 #include 指令包含的单独文件.然后你可以调用另一个函数.

You must use a tool called a "header". In a header you declare the function that you want to use. Then you include it in both files. A header is a separate file included using the #include directive. Then you may call the other function.

void MyFunc();

main.cpp

#include "other.h"
int main() {
    MyFunc();
}

other.cpp

#include "other.h"
#include <iostream>
void MyFunc() {
    std::cout << "Ohai from another .cpp file!";
    std::cin.get();
}

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