zhangchanggong001

import java.util.Scanner;

public class exam_1_3 {
   public static void main(String args[]) {
       System.out.println("请输入圆的半径：");
       Scanner sc=new Scanner(System.in);
       double r=sc.nextDouble();
       Yuanxing_1_3 yuanxing=new Yuanxing_1_3();
       System.out.print(yuanxing.C_Yuanxing(r));
       System.out.println("请输入三角形的边长：");
       Scanner sca=new Scanner(System.in);
       double x=sca.nextDouble();
       double y=sca.nextDouble();
       double z=sca.nextDouble();
       C_1 sanjiaoxing=new Sanjiaoxing_1_3();
       try {
           System.out.print(sanjiaoxing.C_Sanjiaoxing(x, y, z));
       } catch (MyException_1_3 e) {
           System.out.print(e.getMessage());
       }
       sc.close();
   }
}
class Sanjiaoxing_1_3 implements C_1{
   public double C_Sanjiaoxing(double x1, double y1, double z1) throws MyException_1_3{
       if((x1+y1<=z1)||(x1+z1<=y1)||(y1+z1<=x1)) {
           MyException_1_3 MyEx=new MyException_1_3();
           throw MyEx;
       }
       return x1+y1+z1;
   }
}
class Yuanxing_1_3 implements C_1{
   double pi=3.14;
   public double C_Yuanxing(double r) {
       return 2*pi*r;
   }
}
interface C_1{
   double C_Sanjiaoxing(double x1,double y1,double z1) throws MyException_1_3;
   double C_Yuanxing(double r);
}
class MyException_1_3 extends Exception{
   String message;
MyException_1_3(){
message="错误提示：两边之和小于第三边";
}
public String getMessage(){
return message;
}
}

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