Could you comment? Write a base class called Rectangle, which has two private me

Question

Could you comment?

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

Explanation / Answer

Program:

//Rectangle class

class Rectangle {

private double width;
private double length;

public Rectangle(double width, double length) {
this.width = width;
this.length = length;
}
public double getLength() {
return length;
}
public double getWidth() {
return width;
}

//Area function
public double area() {
return width * length;
}
}

//Square class derived from rectangle class.
class Square extends Rectangle {

//constructor

public Square(double length) {
super(length, length);
}

//area function
public double areaSquare() {
return getLength()*getLength();
}
}

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