Kursinnhold

C# Beyond Basics

1. Additional Structures & File Handling

What are Lists?Practicing List Declaration List Methods What are Dictionaries?Practicing Dictionaries Reading Files using StreamReader Reading Files using File Methods Writing Files Error Handling Practicing Error Handling

2. Structs & Enumerators

What are Structs?Defining & Using a Structure Practicing Structs Structs with Other Data Structures Struct Methods Correctly Accessing Fields in Struct Methods Practicing Methods Struct Constructors Practicing Constructors Enumerators Practicing Enumerator

3. Introduction to Object-Oriented Programming (OOP)

What is Object-Oriented Programming?Defining Classes Practice: Creating Classes Class Objects Class Objects vs Struct Objects Practice: Objects Class Methods Practice: Methods Class Constructors Practice: Constructors

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?

Struct Methods

A structure can also have methods apart from data fields. In a Struct, we create a method similar to how we create a method in general:

index.cs


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struct structureName
{
    // some fields here (optional)

    public returnType methodName(parameter1, parameter2, ...) 
    {
        // code
    }
}

For-example:

index.cs


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struct Player
{
    public string name;
    public int score;

    public void displayScore()
    {
        Console.WriteLine($"{name} has {score} score");
    }
}

In the Player structure we have a method called displayScore which displays a formatted output message containing the name and score. It is important to note that the name and score values will be different for each object (instance), which means that the displayScore method will show a different output for each object.

We can access and execute the method using the variableName.methodName() syntax. Let's look at how we will use the Player structure:

index.cs


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using System;

struct Player
{
    public string name;
    public int score;

    public void displayScore()
    {
        Console.WriteLine($"{name} has {score} score");
    }
}

class ConsoleApp
{
    static void Main(string[] args)
    {
        Player player1 = new Player();
        Player player2 = new Player();

        player1.name = "SuperKillerPro";
        player1.score = 100;

        player2.name = "Cyrex";
        player2.score = 77;

        player1.displayScore();
        player2.displayScore();
    }
}

In the example, two objects were created using the Player class and some data was assigned to them. The displayScore method was called using each object and the output turned out to be different for each of them.

We can also have methods with some parameters. Let's add a new method called "addScore" which increases the score by a specified amount and try using it:

index.cs


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using System;

struct Player
{
    public string name;
    public int score;

    public void displayScore()
    {
        Console.WriteLine($"{name} has {score} score");
    }

    public void addScore(int add)
    {
        score += add;
    }
}

class ConsoleApp {
    static void Main(string[] args)
    {
        Player player1 = new Player();

        player1.name = "SuperKillerPro";
        player1.score = 100;

        player1.displayScore();
        player1.addScore(70);
        player1.displayScore();
    }
}

You can see from the output that the method updates the score by 70 points.

1. Which is a valid keyword for declaring a method?

2. What will be the output of the following code?

Alt var klart?

Takk for tilbakemeldingene dine!

Seksjon 2. Kapittel 5

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Kursinnhold

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?

Struct Methods

A structure can also have methods apart from data fields. In a Struct, we create a method similar to how we create a method in general:

index.cs


              123456789
            
struct structureName
{
    // some fields here (optional)

    public returnType methodName(parameter1, parameter2, ...) 
    {
        // code
    }
}

For-example:

index.cs


              12345678910
            
struct Player
{
    public string name;
    public int score;

    public void displayScore()
    {
        Console.WriteLine($"{name} has {score} score");
    }
}

We can access and execute the method using the variableName.methodName() syntax. Let's look at how we will use the Player structure:

index.cs


              123456789101112131415161718192021222324252627282930
            
using System;

struct Player
{
    public string name;
    public int score;

    public void displayScore()
    {
        Console.WriteLine($"{name} has {score} score");
    }
}

class ConsoleApp
{
    static void Main(string[] args)
    {
        Player player1 = new Player();
        Player player2 = new Player();

        player1.name = "SuperKillerPro";
        player1.score = 100;

        player2.name = "Cyrex";
        player2.score = 77;

        player1.displayScore();
        player2.displayScore();
    }
}

We can also have methods with some parameters. Let's add a new method called "addScore" which increases the score by a specified amount and try using it:

index.cs


              12345678910111213141516171819202122232425262728293031
            
using System;

struct Player
{
    public string name;
    public int score;

    public void displayScore()
    {
        Console.WriteLine($"{name} has {score} score");
    }

    public void addScore(int add)
    {
        score += add;
    }
}

class ConsoleApp {
    static void Main(string[] args)
    {
        Player player1 = new Player();

        player1.name = "SuperKillerPro";
        player1.score = 100;

        player1.displayScore();
        player1.addScore(70);
        player1.displayScore();
    }
}

You can see from the output that the method updates the score by 70 points.

1. Which is a valid keyword for declaring a method?

2. What will be the output of the following code?

Alt var klart?

Takk for tilbakemeldingene dine!

Seksjon 2. Kapittel 5