Write a base class called Rectangle, which has two private member variables leng

Question

Write a base class called Rectangle, which has two private member variables length and width. Write a constructor functions to set the values of width and length of the rectangle and also a function called area, where you calculate the area of the rectangle. Next derive a class called Square from Rectangle. Note that square has no member variable rather it uses the member variable from base class rectangle. Write constructor for this class and also provide a function called areaSquare to calculate area of square

simple c++ shorten the code please

Explanation / Answer

/*
* File:   main.cpp
* Author: Sravan Yadav E
*
* Created on October 28, 2014, 5:16 PM
*/

#include <cstdlib>
#include<iostream>

using namespace std;

class Rectangle
{
   protected:
       double length;
       double width;
   public:
       double area;     
       Rectangle()
       {
          cout<<"Enter length:"<<endl;
          cin>>length;
          cout<<"Enter width:"<<endl;
          cin>>width;
       }
        void calcAreaRectangle()
       {
           area=length*width;
       }
       void printRectangle()
       {
          cout<<"Area of rectangle: "<<area<<endl;
       }
     
};

// Derived class
class Square: public Rectangle
{
   public:
       Square(): Rectangle()
       {
              calcAreaRectangle();     
           cout<<"Enter side for square: "<<endl;
           cin>>Rectangle::length;
       }
       void calcAreaSquare()
       {
           area=length*length;                    
       }
       void printSquare()
       {
          cout<<"Area of square: "<<area<<endl;
       }
};
      
int main(void)
{
   Square s;
   s.printRectangle();
   s.calcAreaSquare();
   s.printSquare();
return 0;
}

Output:

Enter length:
4
Enter width:
5
Enter side for square:
6
Area of rectangle: 20
Area of square: 36

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