บทนำสู่คลาสและอ็อบเจ็กต์

คลาสคืออะไร

อ็อบเจ็กต์คืออะไร

การกำหนดคลาส

using System;

class Car {
    public string Color; // Attribute
    public void Drive() { // Method
        Console.WriteLine("The car is driving.");
    }
}

การสร้างอ็อบเจ็กต์

using System;

class Car {
    public string Color; // Attribute
    public void Drive() { // Method
        Console.WriteLine("The car is driving.");
    }
}

class Program {
    static void Main() {
        Car myCar = new Car(); // Create an object of the Car class
        myCar.Color = "Red"; // Set the attribute
        Console.WriteLine("Car color: " + myCar.Color); // Outputs: Car color: Red
        myCar.Drive(); // Call the method
    }
}

ตัวกำหนดการเข้าถึง

using System;

class Car {
    private string engine; // Private attribute
    public string Color; // Public attribute

    public void SetEngine(string value) { // Public method to modify private attribute
        engine = value;
    }

    public void ShowEngine() { // Public method to access private attribute
        Console.WriteLine("Engine: " + engine);
    }
}

class Program {
    static void Main() {
        Car myCar = new Car();
        myCar.Color = "Blue";
        myCar.SetEngine("V8");
        Console.WriteLine("Car color: " + myCar.Color);
        myCar.ShowEngine(); // Outputs: Engine: V8
    }
}

การจัดระเบียบโค้ด

โจทย์ฝึกปฏิบัติ

using System;

class Book {
    public string Title;
    public string Author;

    public void DisplayInfo() {
        Console.WriteLine("Title: " + Title);
        Console.WriteLine("Author: " + Author);
    }
}

class Program {
    static void Main() {
        Book myBook = new Book();
        myBook.Title = "C# Programming";
        myBook.Author = "John Doe";

        myBook.DisplayInfo();
    }
}

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