2023-06-19 Untiy进阶 C#知识补充3——C#1-4主要功能与语法

在Unity进阶的道路上，掌握C#语言是至关重要的。今天我们将继续学习C#的主要功能与语法，主要涉及C#1-4的知识点。让我们一起来看看吧！

1. 类与对象在C#中，类是一种用户自定义的数据类型，用于封装数据和方法。对象是类的实例化，通过new关键字来创建对象。下面是一个简单的类和对象的示例：

csharppublic class Person{
 public string name;
 public int age;

 public void SayHello()
 {
 Console.WriteLine("Hello, my name is " + name + " and I am " + age + " years old.");
 }
}

Person person1 = new Person();
person1.name = "Alice";
person1.age =25;
person1.SayHello();

csharppublic class Circle{
 private double radius;

 public double Radius {
 get { return radius; }
 set { radius = value; }
 }

 public double CalculateArea()
 {
 return Math.PI * radius * radius;
 }
}

Circle circle1 = new Circle();
circle1.Radius =5;
double area = circle1.CalculateArea();
Console.WriteLine("The area of the circle is: " + area);

csharppublic class Car{
 public string make;
 public string model;
 public int year;

 public Car(string make, string model, int year)
 {
 this.make = make;
 this.model = model;
 this.year = year;
 }

 public void DisplayInfo()
 {
 Console.WriteLine("This car is a " + year + " " + make + " " + model);
 }
}

Car car1 = new Car("Toyota", "Camry",2023);
car1.DisplayInfo();

csharppublic class Animal{
 public virtual void MakeSound()
 {
 Console.WriteLine("Animal makes a sound");
 }
}

public class Dog : Animal{
 public override void MakeSound()
 {
 Console.WriteLine("Dog barks");
 }
}

Animal animal1 = new Animal();
Animal dog1 = new Dog();

animal1.MakeSound();
dog1.MakeSound();