6.19 多态

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace _6._19_多态
 8 {
 9     class Program
10     {
11         static void Main(string[] args)
12         {
13             /*多态，有了继承才有多态
14             继承同一个父类的所有子类，使用起来都不一样*/
15             Console.WriteLine("男人");
16             men m = new men();
17             m.chifan();
18             m.xihuanchi();
19             m.zuqiu();
20 
21 
22             Console.WriteLine("女人");
23             women w = new women();
24             w.chifan();
25             w.xihuanchi();
26             w.guangjie();
27 
28             Console.WriteLine("小男孩");
29             xiaomen x = new xiaomen();
30             x.naifen();
31             x.xihuanchi();//执行men 里面的语句，而不是ren 里面的语句
32             x.chifan();
33 
34             Console.ReadLine();
35 
36 
37         }
38     }
39 }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _6._19_2_抽象类
{
    public abstract  class ren
    {
        public abstract void chifan();
        public abstract void hejiu();
        public void huxi()
    {
        Console.WriteLine("人需要呼吸");
    }
        public virtual void heshui()
        {
            Console.WriteLine("人需要喝水");
        }
        public  void yule()
    {
        Console.WriteLine("父集人需要娱乐");
    }
        public abstract void pengyou()
        {
            Console.WriteLine("喜欢交朋友");
        }
        
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _6._19_2_抽象类
{
    class nanren : ren //子集不需要注明，类型是抽象类
    {
        public override void chifan()
        {
            Console.WriteLine("喜欢吃肉");
        }
        public override void hejiu()
        {
            Console.WriteLine("喜欢喝梦之蓝");
        }
        public override void pengyou()
        { 
        
        }
       
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _6._19_多态
{
    class women:ren
    {
        public override void xihuanchi()
        {
            Console.WriteLine("我是女人，喜欢吃菜");
         }
        public void guangjie()
        {
            Console.WriteLine("我爱逛街");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _6._19_多态
{
    class xiaomen : men
    {
        public void naifen()
        {
            Console.WriteLine("喜欢吃奶粉");
        }
    }
}