C++ - Define a base class `shapeClass`, the class - Has two data members `width` and `height`, which are integers - Has two member functions `setWidth` and `setHeight`, which are used to change the two data members- Define a new class `rectangleClass` which is derived from the base class `shapeClass`, the class - Has a member function `getArea`, which calculates the area- In the `main` function, create an object of `rectangleClass`, set its width and height, and then calculate its area using the member function.

Programing Approach: // including header file and using namespace // defining shape class // width and height in protected mode // function outside the class is not access it protected // class( ) function for setting width and height // rectangle class publicly inherited shape class // defining area to store area // function( ) to calculate area // object of rectangle class // X,Y for storing user input width and height // function ( ) call for setting width and height // printing area //including all required header files#include <iostream> using namespace std; //defining shapeClassclass shapeClass{//width and height in protected mode so//function outside the class cannot access itprotected:int width;int height;public://class function for setting width and heightvoid setWidth(int x) {width = x;}void setHeight(int y) {height = y;} }; //rectangle class wit publicly inherited shapeclassclass rectangleClass: public shapeClass{//defining area to store areaint area;public://function to calculate areaint getArea(){area = width * height;return area;}}; int main(){//object of rectangleClassrectangleClass rectangle;//x,y for storing user input width and heightint x,y;cout<<"Enter width of rectangle:\n";cin>>x;cout<<"Enter height of rectangle:\n";cin>>y;//function call for setting width and heightrectangle.setWidth(x);rectangle.setHeight(y); //printing area.cout<<"the area of rectangle is:\n "<<rectangle.getArea();return 0;}SAMPLE OUTPUT: