类析构函数的实际应用 [英] Practical application of class destructor

问题描述

我目前正试图学习类和构造函数/析构函数。我明白这两个是做什么，但我有一个更难的时间与析构函数，因为我不能想到一个实际的应用程序使用。

I'm currently trying to learn about classes and constructors/destructors. I understand what the two do, but I'm having a harder time with the destructors because I can't think of a practical application for its use.

任何人都可以提供一个具有解释的示例？

Can anyone provide an example with an explanation?

推荐答案

析构函数是用于释放对象分配的任何资源的特殊成员函数。

Destructors are special member functions used to release any resources allocated by the object.

最常见的例子是类的构造函数使用 new ，析构函数使用 delete 以释放内存。

The most common example is when the constructor of the class uses new, and the destructor uses delete to deallocate the memory.

class Myclass
{
    int *m_ptr;
    public:
        Myclass():m_ptr(new int)
        {
        }
        ~Myclass()
        {
             delete m_ptr;
        }
        //ToDo: Follow Rule of Three
        //Provide definitions for copy constructor & copy assignment operator as well

};

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