public class GetData {public static char triangle(int a, int b, int c) {if(a<=b+c ||b<=a+c || c<=a+b){if ((a==b)&& (b==c)&&(c==a)) {return '1';}else if ((a==b) || (b==c) || (a==c)) {return '2';}else if (a*a+b*b==c*c || b*b+c*c==a*a || a*a+c*c==b*b) {return '3';}else {return '4';}}else {return '5';}}
}import java.util.Scanner;public class Main {static String equaltrianger = "等边三角形";static String isotrianger = "等腰三角形";static String comtrianger = "一般三角形";static String rigtrianger = "直角三角形";static String sidewrong = "边值不在范围";static String noconstruct = "不构成三角形";public static void main(String[] args) {char resulet = ' ';System.out.println(" 1 进行三角形判断操作");System.out.println(" x 退出程序");while(true){Scanner sc = new Scanner(System.in);    String temp =sc.nextLine(); switch (temp){case "1":{ System.out.println("请输入三角形的三条边：");try {Scanner sca = new Scanner(System.in);int a = sca.nextInt();Scanner scb = new Scanner(System.in);int b = scb.nextInt();Scanner scc = new Scanner(System.in);int c = scc.nextInt();if (a<1 || a>100 || b<1 || b>100 || c<1 || c>100) {System.out.println("边值不在范围");}else {resulet =  GetData.triangle(a, b, c);if (resulet == '1') {System.out.println(equaltrianger);}else if (resulet == '2') {System.out.println(isotrianger);}else if (resulet == '3') {System.out.println(rigtrianger);}else if (resulet == '4') {System.out.println(comtrianger);}else {System.out.println(noconstruct);}}System.out.println(" 1 进行三角形判断操作");System.out.println(" x 退出程序");                            break;} catch (Exception e) {System.out.println("请输入正确的边值！");System.out.println(" 1 进行三角形判断操作");System.out.println(" x 退出程序");break;}    }case "x": System.exit(1);default:System.out.println("请选择正确的操作！") ; }}        }
}