Question

Write the definition of an abstract class shape that define two abstract methods and get Area() and getPerlmeter() returning, respectively the area and the perimeter of that shape. Then write the definition and implementation of a derived classes class shape: class Rectangle. Rectangle class defines two private side integer fields and it overrides methods getArea() and getPerimeter() of the shape class.

Answer 1

#include <iostream>
using namespace std;

class Shape
{
  
   private :


   public:
   //abstract methods
   virtual int getArea();
   virtual int getPerimeter();
  
};

class Rectangle :public Shape
{
private:
int side1,side2;


public:
Rectangle(int side1,int side2) //constructor
{
      this->side1 = side1;
      this->side2 = side2;
}

//overriding base class abstract methods
int getArea()
{
     return side1*side2;
}
int getPerimeter()
{
    return 2*(side1+side2);
}
  
  
};
int main()
{
    int s1,s2;
    cout<<"Enter the sides of Rectangle :";
    cin>>s1>>s2;   //input rectangle sides
   Rectangle rect(s1,s2);
  
   //call methods
   cout<<"\nArea of Rectangle : "<<rect.getArea();
   cout<<"\nPerimeter of Rectangle : "<<rect.getPerimeter();
  
   return 0;
}

output:

Enter the sides of Rectangle : 64 20

Area of Rectangle : 1280

Perimeter of Rectangle : 168