每日一题01

因为要求类中属性私有，用get()函数获取私有变量。

public class base {
    private final int x;
    private final int y;
    public base (int x,int y) {
        this.x = x;
        this.y = y;
    }
    public int getX () {return x;}
    public int getY () {return y;}
    public void calculate ()
    {
        System.out.println(getX()*getY());
    }
}
public class Sub extends base {
    public Sub (int x, int y) {
        super(x, y);
    }
    @Override
    public void calculate ()
    {
        if (super.getY()==0)
            System.out.print("Error");
        else
            System.out.print(super.getX()/super.getY());
            System.out.print(" ");
    }
}
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt())
        {
            int x = scanner.nextInt();
            int y = scanner.nextInt();
            Sub sub = new Sub(x,y);
            base base = new base(x,y);
            sub.calculate();
            base.calculate();
        }
    }
}