相关疑难解决方法(0)

Say we have this header file:

MyClass.hpp

#pragma once
#include <vector>

class MyClass
{
public:
    MyClass(double);

    /* ... */

private:
    std::vector<double> internal_values;
};

Now, whenever we use #include "MyClass.hpp" in some other hpp or cpp file, we effectively also #include <vector>, despite the fact that we do not need it. The reason I am saying it is not needed is that std::vector is only used internally in MyClass, but it is not required at all to actually interact …

我有一个关于头文件,包含语句和良好编码风格的快速问题.假设我有2个类,包含相关的源文件和头文件,然后是main()所在的最终源文件.

在Foo.hpp中,我有以下声明:

#include <string>
#include <iostream>
#include <exception>

现在有了Bar.hpp我有以下声明:

#include "Foo.hpp"
#include <string>

最后使用Myprogram.cpp我有以下声明:

#include "Bar.hpp"
#include <string>
#include <iostream>
#include <exception>

我知道Myprogram.cpp中的<>中的include语句和Bar.hpp对于程序编译和运行不是必需的,但是最好的做法或正确的做法是什么？有没有理由不在每个文件中明确包含必要的头文件？