C#-接口

publicinterfaceAnimalone{        //接口方法不能用修饰符修饰voidToSpeak();
}

publicclassCatone : Animalone{        
publicvoidToSpeak()
    {
Console.Write("喵喵喵\r\n");
    }
}
publicclassDogone : Animalone{
publicvoidToSpeak()
    {
Console.Write("汪汪汪\r\n");
    }
}    
publicclassbirdone : Animalone{        
publicvoidToSpeak()
    {
Console.Write("喳喳喳\r\n");
    }
}

//接口继承//C# 单继承，使用接口可以继承多个基类publicinterfaceAnimaltwo : Animalone{        
voidEatFood();
}    
//继承子接口时，要实现所有接口的方法publicclassCattwo : Animaltwo{        
publicvoidEatFood()
    {
Console.Write("猫粮\r\n");
    }        
publicvoidToSpeak()
    {
Console.Write("喵喵喵\r\n");
    }
}

//显示接口实现interfaceAnimalThree{        
voidMove();
}
interfaceAnimalfour{        
voidMove();
}    
publicclassCat : AnimalThree, Animalfour{        
voidAnimalThree.Move()
    {
Console.Write("run\r\n");
    }        
voidAnimalfour.Move()
    {
Console.Write("swarm\r\n");
    }
}
完整代码```c#usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Threading.Tasks;
namespaceTestInterface{    
//接口//定义一个接口，只能做方法声明，继承自接口的类，必须实现接口方法publicinterfaceAnimalone    {        
//接口方法不能用修饰符修饰voidToSpeak();
    }    
publicclassCatone : Animalone    {        
publicvoidToSpeak()
        {
Console.Write("喵喵喵\r\n");
        }
    }    
publicclassDogone : Animalone    {
publicvoidToSpeak()
        {
Console.Write("汪汪汪\r\n");
        }
    }
publicclassbirdone : Animalone    {
publicvoidToSpeak()
        {
Console.Write("喳喳喳\r\n");
        }
    }    
publicclasszooone    {
publicvoidSpeak(Animaloneanimals)
        {
animals.ToSpeak();
        }
    }    
//接口继承//C# 单继承，使用接口可以继承多个基类publicinterfaceAnimaltwo : Animalone    {        
voidEatFood();
    }    //继承子接口时，要实现所有接口的方法publicclassCattwo : Animaltwo    {
publicvoidEatFood()
        {
Console.Write("猫粮\r\n");
        }        
publicvoidToSpeak()
        {
Console.Write("喵喵喵\r\n");
        }
    }    
publicclasszootwo    {
publicvoidEatFood(Animaltwoanimals)
        {
animals.EatFood();
        }        
publicvoidTospeak(Animaltwoanimals)
        {
animals.ToSpeak();
        }
    }    
//显示接口实现interfaceAnimalThree    {        
voidMove();
    }
interfaceAnimalfour    {        
voidMove();
    }    
publicclassCat : AnimalThree, Animalfour    {        
voidAnimalThree.Move()
        {
Console.Write("run\r\n");
        }        
voidAnimalfour.Move()
        {
Console.Write("swarm\r\n");
        }
    }    
classProgram    {
staticvoidMain(string[] args)
        {
zooonez=newzooone();
z.Speak(newCatone());
z.Speak(newDogone());
z.Speak(newbirdone());
zootwoztwo=newzootwo();
ztwo.EatFood(newCattwo());
ztwo.Tospeak(newCattwo());
Catcat=newCat();
AnimalThreethree=cat;
three.Move();
Animalfourfour=cat;
four.Move();
Console.Read();
        }
    }
}