Challenge 2: Implement and Override a Method
Can you override the CalcArea() method in a derived class? A solution is placed in the solution section to help you, but we suggest you try to solve it on your own first.
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Polymorphism in Shapes
Shapes are a perfect example of polymorphism. There are many types of shapes, e.g., circles, triangles, squares, rectangles, etc. Each of these shapes has an area but the way it is calculated is different for each shape. For example, a square’s area will be calculated as follows:
On the other hand, the area of a circle will be calculated as follows:
Consider we have a base class, Shape
, and a derived class, Circle
.
Problem Statement
Write a method in the Circle
class which overrides the virtual
method CalcArea()
and returns double
in the
Shape
class. The overriding method calculates the area of a circle and returns it.
The value of Pi is 3.14.
You are given a partially completed code in the editor. Modify the code so that the code prints the following:
Input
A radius
Output
The area of the circle with the given radius
Sample Input
Shape circle = new Circle(2);
Sample Output
circle.CalcArea() = 12.56
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