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 |
1 import java.util.*; 2 public class Main{ 3 public static void main(String[] args){ 4 Scanner in = new Scanner(System.in); 5 double x1,y1,r1,x2,y2,r2; 6 x1 = in.nextDouble(); y1 = in.nextDouble(); r1 = in.nextDouble(); 7 x2 = in.nextDouble(); y2 = in.nextDouble(); r2 = in.nextDouble(); 8 Circle c1 = new Circle(x1,y1,r1); 9 Circle c2 = new Circle(x2,y2,r2); 10 if(c1.intersect(c2)) 11 System.out.println("intersected"); 12 else 13 System.out.println("not intersected"); 14 } 15 } 16 17 class Circle{ 18 private double x; 19 private double y; 20 private double radium; 21 public Circle(double x,double y,double radium){ 22 this.x=x; this.y=y; this.radium=radium; 23 } 24 public boolean intersect(Circle c){ 25 double dis = Math.sqrt((c.x-x)*(c.x-x)+(c.y-y)*(c.y-y)); 26 return dis <= radium + c.radium; 27 } 28 }