Description

Problems for exercises and homework for the “C# OOP” course @ SoftUni”.
You can check your solutions here: https://judge.softuni.bg/Contests/1501/Interfaces-and-Abstraction-Lab
1. Shapes
NOTE: You need a public StartUp class with the namespace Shapes.
Build hierarchy of interfaces and classes:

You should be able to use the class like this:
StartUp.cs
var radius = int.Parse(Console.ReadLine());
IDrawable circle = new Circle(radius);
var width = int.Parse(Console.ReadLine()); var height = int.Parse(Console.ReadLine()); IDrawable rect = new Rectangle(width, height);

circle.Draw(); rect.Draw();
Examples
Input Output
3
4
5 *******
** **
** **
* *
** **
** **
*******
****
* *
* *
* *
****

Solution
The algorithm for drawing a circle is:

The algorithm for drawing a rectangle is:

2. Cars
NOTE: You need a public StartUp class with the namespace Cars.
Build a hierarchy of interfaces and classes:

Your hierarchy must be used with this code:
StartUp.cs
ICar seat = new Seat(“Leon”, “Grey”);
ICar tesla = new Tesla(“Model 3”, “Red”, 2);

Console.WriteLine(seat.ToString());
Console.WriteLine(tesla.ToString());
Examples
Output
Grey Seat Leon Engine start
Breaaak!
Red Tesla Model 3 with 2 Batteries Engine start
Breaaak!