c++ base constructor

In C++, a base constructor is a constructor that is called before the derived class constructor. Here are the steps involved in using a base constructor in C++:

1. Define the base class: Start by defining the base class with its member variables and member functions.

2. Declare the derived class: Declare the derived class, which will inherit from the base class.

3. Define the derived class: Define the derived class, including its member variables and member functions.

4. Call the base constructor: In the derived class constructor, use the initialization list to call the base constructor. This is done by specifying the base class name followed by the arguments to be passed to the base constructor.

5. Execute the base constructor: When the derived class object is created, the base constructor is executed first, followed by the derived class constructor.

6. Initialize base class members: Inside the base constructor, you can initialize the member variables of the base class.

7. Initialize derived class members: After the base constructor has been executed, the derived class constructor can initialize the member variables of the derived class.

By using a base constructor in C++, you can ensure that the base class is properly initialized before the derived class is constructed. This allows for better code organization and helps in achieving code reuse through inheritance.