计算机17-3,4作业C

C.Class Degisn

Description

定义一个Circle类，有成员变量（或称之为域）x，y（圆心坐标）r（圆半径），成员方法intersect（）两个圆是否相交的判断方法，和所需要的若干个构造方法。

Input

两个Circle类的成员变量值

Output

若交叉输出intersected，否则输出not intersected

Sample Input

10

10

5

60

60

5

 import java.util.*;
 public class Main{
     public static void main(String[] args){
         Scanner in = new Scanner(System.in);
         double x1,y1,r1,x2,y2,r2;
         x1 = in.nextDouble(); y1 = in.nextDouble(); r1 = in.nextDouble();
         x2 = in.nextDouble(); y2 = in.nextDouble(); r2 = in.nextDouble();
         Circle c1 = new Circle(x1,y1,r1);
         Circle c2 = new Circle(x2,y2,r2);
         if(c1.intersect(c2))
             System.out.println("intersected");
         else
             System.out.println("not intersected");
     }
 }

 class Circle{
     private double x;
     private double y;
     private double radium;
     public Circle(double x,double y,double radium){
         this.x=x; this.y=y; this.radium=radium;
     }
     public boolean intersect(Circle c){
         double dis = Math.sqrt((c.x-x)*(c.x-x)+(c.y-y)*(c.y-y));
         return dis <= radium + c.radium;
     }
 }