Problem D: 抽象类

1.题目问题

2.输入

3.输出

4.代码实现

补充：

没错，你没看错，没有 abstract class Vehicle ，才能过。

恶心人

答案：

{
     abstract void NoOfWheels();
}

class Car extends Vehicle {
    @Override
    public void NoOfWheels() {
        System.out.println
                ("four wheels");
    }
}

class Motorbike extends Vehicle {
    @Override
    public void NoOfWheels() {
        System.out.println("two wheels");
    }
}

完整代码：

abstract class Vehicle {
     abstract void NoOfWheels();
}

class Car extends Vehicle {
    @Override
    public void NoOfWheels() {
        System.out.println
                ("four wheels");
    }
}

class Motorbike extends Vehicle {
    @Override
    public void NoOfWheels() {
        System.out.println("two wheels");
    }
}

class Main{
    public static void main(String[] args){
        Car c=new Car();
        c.NoOfWheels();
        Motorbike m=new Motorbike();
        m.NoOfWheels();
    }
}