C++ copy control and copy constructor

In C++ programming, copy control refers to the process of managing the copying of class objects. When we create a class and instantiate multiple objects, sometimes we need to copy between objects. C++ provides a copy control mechanism to manage the copy behavior of objects. One of the important concepts is the copy constructor.

The copy constructor is a special constructor used to create a new object and initialize it as a copy of the same type of object. It is usually called in the following situations:

1. By using one object to initialize another object of the same type.
2. Pass an object by value as a function parameter.
3. Return an object from a function.

Below we will use a sample code to illustrate the use of copy control and copy constructor.

#include <iostream>

class MyClass {
   
    
    
private:
    int* data;

public: