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  • C# 重载 overload,重写override覆盖

    重载overload

    派生类和基类的方法同名,其中访问修饰符(public,private,protected,internal,protected internal),返回类型,参数类型,个数,顺序中的一个或若干可以不同,实现可以不同;

    重写override

    必须对抽象类中声明的abstract方法override实现抽象类的抽象方法。可以重写virtual虚函数

    interface IMath
    {
    void Add(int x, int y);
    }

    public abstract class FirstAbstractClass : IMath
    {
    public void Add(int x, int y)
    {
    Console.WriteLine("This is the abstract class add method:{0}+{1}={2}", x, y, x + y);
    }

    public abstract void Add(int x, int y,int z);

    public virtual void Add(int x,int y,int m,int n)
    {
    Console.WriteLine("This is the virtual method in abstract class :{0}+{1}+{2}+{3}={4}", x, y, m, n, x + y + m + n);
    }
    }

    public class ConcreteClass : FirstAbstractClass
    {
    public override void Add(int x, int y, int z)
    {
    Console.WriteLine("This is the implementation of the abstract method from abstract class! {0}+{1}+{2}={3} ", x, y, z, x + y + z);
    }

    public override void Add(int x, int y, int m, int n)
    {
    Console.WriteLine("This is the implementation of the virtual method from the abstract class,it's not compulsory! {0}+{1}+{2}+{3}={4}", x, y, m, n, x + y + m + n);
    }
    }
    class Program
    {
    static void Main(string[] args)
    {
    int x = 9876, y = 9876, z = 876, w = 65687;
    ConcreteClass obj = new ConcreteClass();
    obj.Add(x, y);
    obj.Add(x, y, z);
    obj.Add(x, y, z, w);
    Console.ReadLine();
    }
    }

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  • 原文地址:https://www.cnblogs.com/Fred1987/p/5980920.html
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