Answer to Question #212992 in C++ for ashar

Question

Write a program having Classes Rectangle with data members’ length and width, Square with data member side, EquilatralTraingle with data member side. All these classes are derived from class Shape. Write an independent function which will exhibit polymorphism and show the area of the object passed to the function. All data members of class are private; you can write suitable functions needed for you

Answer 1

Here the original annotation: https://www.tutorialspoint.com/cplusplus/cpp_polymorphism.htm

#include <iostream> 
using namespace std;
 
class Shape {
   protected:
      int width, height;
      
   public:
      Shape( int a = 0, int b = 0){
         width = a;
         height = b;
      }
      int area() {
         cout << "Parent class area :" <<endl;
         return 0;
      }
};
class Rectangle: public Shape {
   public:
      Rectangle( int a = 0, int b = 0):Shape(a, b) { }
      
      int area () { 
         cout << "Rectangle class area :" <<endl;
         return (width * height); 
      }
};

class Triangle: public Shape {
   public:
      Triangle( int a = 0, int b = 0):Shape(a, b) { }
      
      int area () { 
         cout << "Triangle class area :" <<endl;
         return (width * height / 2); 
      }
};