209象限座標

/******
檔名：JPA02.java
題目：TQC+ JAVA6物件導向程式設計 參考答案
時間：2015/06
作者：fang shi mai
******/
import java.util.*;

public class JPA02
{
    static Scanner keyboard = new Scanner(System.in);
    
    public static void main(String[] args)
    {
        test();
        test();
        test();
        test();
    }
    public static void test()
    {
        double x;
        double y;
        
        System.out.print("請輸入x座標：");
        x=keyboard.nextDouble();
        System.out.print("請輸入y座標：");
        y=keyboard.nextDouble();
        
        if(x==0 && y==0)
            System.out.printf("(%.2f,%.2f)在原點上\n",x,y);
        else if(y==0)
            System.out.printf("(%.2f,%.2f)在x軸上\n",x,y);
        else if(x==0)
            System.out.printf("(%.2f,%.2f)在y軸上\n",x,y);
        else if(x>0 && y>0)
            System.out.printf("(%.2f,%.2f)在第一象限\n",x,y);
        else if(x<0 && y>0)
            System.out.printf("(%.2f,%.2f)在第二象限\n",x,y);
        else if(x<0 && y<0)
            System.out.printf("(%.2f,%.2f)在第三象限\n",x,y);
        else if(x>0 && y<0)
            System.out.printf("(%.2f,%.2f)在第四象限\n",x,y);
    }
}