Esercitazione 9

Esercizio 1 

Implement a Cerchio class that inherits from the Punto class. 
An object of the Punto class will be the center of the circle. 
For the Punto class, implement two get functions (one the x and one for the y coordinates) 
and one set function (i.e. you set x and y with a single function). 
For the Cerchio class implement the functions SetRadius() and GetRadius() and GetArea().
Start from the Exercise in Esercitazione7 for the implementation of the Punto class

Example of execution:
./cerchio
Center and Radius
x: 1 y: 1 r: 4
New Center Coordinates [3, 2]
Area : 50.24