Gain insights into OOP with C#. Delve into practical coding examples and exercises, exploring OOP concepts through a real-world vending machine project to understand and apply them effectively.

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Project

Object-oriented programming (OOP) has been around for decades. As the original object-oriented language, C# is a mainstay in the world of computer programming.

All the concepts of object-oriented programming that C# developers love to have in their arsenal are explained in detail along with relevant coding examples and exercises in this course.

This course is unique in its nature as it follows a project-based learning approach. Throughout the course, a real-world example of vending machine is followed to help the learners develop a firm understanding of the stated OOP concepts.

The learners will not only be able to play around with the project,  they’ll also be able to see all the concepts in action in this project.

Learn Object-Oriented Programming in C#

// Square Sum
class SumOfSquares {

  // Method to square the sum of three numbers
  public double SquaresSum(double num1, double num2, double num3) {
    double sum = 0;
    double square1 = 0;
    double square2 = 0;
    double square3 = 0;

    square1 = num1 * num1;
    square2 = num2 * num2;
    square3 = num3 * num3;
    sum = square1 + square2 + square3;

    return sum;
  }
  
}

class Demo {

  public static void Main(string[] args) {
    SumOfSquares sum = new SumOfSquares();
    Console.WriteLine(sum.SquaresSum(2, 3, 4));
  }
}

// Square Sum
class SquareSum {

  // Method to square the sum of three numbers
  double squareSum(double num1, double num2, double num3) {
    double sum = 0;

    num1 = num1 * num1;
    num2 = num2 * num2;
    num3 = num3 * num3;
    sum = num1 + num2 + num3;

    return sum;
  }
}

## Explanation

The solution to the problem is not tricky, let's take a look at the steps involved in it:

* We calculated the squares of the passing numbers, 
* Added them,
* And returned their sum.

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This review lists  the steps involved in solving the 'Square Numbers and Return their Sum' challenge.

Introduction to Object-Oriented Programming

Classes and Objects

Data Hiding

Inheritance

Polymorphism

Abstract Classes and Interfaces

Composition, Aggregation and Association

Solution Review: Square Numbers and Return their Sum