C#中的抽象关键字
C#中的abstract关键字用于抽象类。C#中的抽象类包含抽象和非抽象方法。您不能实例化一个抽象类。
抽象类Vehicle和抽象方法的示例display()-
public abstract class Vehicle {
public abstract void display();
}抽象类具有派生类：公共汽车，汽车和摩托车。以下是Car派生类的实现-
public class Car : Vehicle {
public override void display() {
Console.WriteLine("Car");
}
}示例
以下是C#中抽象类的示例-
using System;
public abstract class Vehicle {
public abstract void display();
}
public class Bus : Vehicle {
public override void display() {
Console.WriteLine("Bus");
}
}
public class Car : Vehicle {
public override void display() {
Console.WriteLine("Car");
}
}
public class Motorcycle : Vehicle {
public override void display() {
Console.WriteLine("Motorcycle");
}
}
public class MyClass {
public static void Main() {
Vehicle v;
v = new Bus();
v.display();
v = new Car();
v.display();
v = new Motorcycle();
v.display();
}
}输出结果
Bus Car Motorcycle