Copy constructor of class objects in C++

This article mainly explains "the copy constructor of class objects in C++". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn the copy constructor of class objects in C++.

Copy constructor is a special constructor, which is called by the compiler to complete the construction and initialization of other objects based on the same class. Its * * parameter (reference to the object) is immutable (of type const). This function is often used to pass and return values of user-defined types when a function is called. The copy constructor calls the copy constructor and member functions of the base class. If possible, it will be called in a constant way, or in a non-constant way.

For ordinary types of objects, copying between them is simple, such as:

Int axiom 100; int bacca

The class object is different from the ordinary object, the internal structure of the class object is generally more complex, there are various member variables. Let's look at a simple example of a class object copy.

# include using namespace std; class CA {public: CA (int b) {aquib;} void Show () {cout