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-classWhere access-specifier is one of public, protected, or private, and base-class is the name of a previously defined class. If the access-specifier is not used, then it is private by default.Consider a base class Shape and its derived class Rectangle as follows:#include <iostream> using namespace std;// Base classclass Shape { public: void setWidth(int w) { width = w; } void setHeight(int h) { height = h; } protected: int width; int height;};// Derived classclass 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;}When the above code is compiled and executed, it produces following result:Total area: 35 C++
Topic: Inheritance
Explain about Base & Derived Classes ?
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Explain about Inheritance Overview ?
Explain about Key Properties of C++ Inheritance
