Class Methods

Just like structs, classes can also have methods. The syntax for creating and calling methods is also very similar:

For example, we can create a class called Rectangle with width and height attributes and a method called area, which calculates the area of the rectangle object based on the width and height values:

index.cs


              1234567
            
class className {
    // ... other class code

    public returnType methodName(datatype param1, datatype param2, ...) {
        // code
    }
}

index.cs


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using System;

public class ConsoleApp
{
    class Rectangle {
        public double width;
        public double height;
        
        public double area() {
            return width * height;
        }
    }
    
    public static void Main(string[] args)
    {
        Rectangle r1 = new Rectangle();
        r1.width = 10;
        r1.height = 20;
        
        Rectangle r2 = new Rectangle();
        r2.width = 14.7;
        r2.height= 17.9;
        
        Console.WriteLine($"Area of R1 is {r1.area()}");
        Console.WriteLine($"Area of R2 is {r2.area()}");
    }
}

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Cursusinhoud

C# Beyond Basics

1. Additional Structures & File Handling

2. Structs & Enumerators

3. Introduction to Object-Oriented Programming (OOP)

4. OOP Essentials

Derived Classes Derived Classes Practice Common Access Modifiers Access Modifiers Practice The `static` Keyword Practicing `static` Keyword Method Overloading Method Overloading Practice

5. OOP Principles

What are the Principles of OOP?Inheritance Practicing Inheritance Polymorphism Practicing Polymorphism Encapsulation Encapsulation Practice Abstraction Abstraction Practice What's Next?

Class Methods

Just like structs, classes can also have methods. The syntax for creating and calling methods is also very similar:

index.cs


              1234567
            
class className {
    // ... other class code

    public returnType methodName(datatype param1, datatype param2, ...) {
        // code
    }
}

index.cs


              123456789101112131415161718192021222324252627
            
using System;

public class ConsoleApp
{
    class Rectangle {
        public double width;
        public double height;
        
        public double area() {
            return width * height;
        }
    }
    
    public static void Main(string[] args)
    {
        Rectangle r1 = new Rectangle();
        r1.width = 10;
        r1.height = 20;
        
        Rectangle r2 = new Rectangle();
        r2.width = 14.7;
        r2.height= 17.9;
        
        Console.WriteLine($"Area of R1 is {r1.area()}");
        Console.WriteLine($"Area of R2 is {r2.area()}");
    }
}

Was alles duidelijk?

Bedankt voor je feedback!

Sectie 3. Hoofdstuk 7