Inheritance derived from, inherit, base classes

Base and Derived Classes

A class can be derived from more than one classes, which means it can inherit data and functions from multiple base classes.

To define a derived class, we use a class derivation list to specify the base class(es).

A class derivation list names one or more base classes and has the form −

class derived-class: access-specifier base-class

#include <iostream>
 
using namespace std; // Base class class Shape { public: void setWidth(int w) { width = w; } void setHeight(int h) { height = h; } protected: int width; int height; }; // Derived class class Rectangle: public Shape { public: int getArea() { return (width * height); } }; int main(void) { Rectangle Rect; Rect.setWidth(5); Rect.setHeight(7); // Print the area of the object. cout << "Total area: " << Rect.getArea() << endl; return 0; }
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Access           public      protected     private
  
Same class         Yes         Yes         Yes

Derived classes    Yes        Yes          No  
Outside classes    yes          No          No
 

Multiple Inheritance

class derived-class: access baseA, access baseB....

https://www.tutorialspoint.com/cplusplus/cpp_inheritance.htm