java实现猜数游戏--进阶版(try......catch捕获异常)

import java.util.Random;
import java.util.Scanner;
public class GuessNum1 {
        public static void main(String[] args) {
            Random r = new Random();
            int sum = r.nextInt(1,201);//1--200的随机数
            Scanner sc = new Scanner(System.in);
            int a = 0;
            while(true){
                System.out.println("请输入数字: ");
                try{
                    a =sc.nextInt();
                }catch (Exception e) {
                    System.out.println("请输入正确的数字: ");
                    sc.next();
                    continue;
                }
                if(a > sum){
                    System.out.println("猜大了");
                }else if(a < sum){
                    System.out.println("猜小了");
                }else{
                    System.out.println("猜对了");
                    break;
                }
            }
        }
    }

import java.util.Random;
import java.util.Scanner;
public class GuessNumber {
    public static void main(String[] args) {
        //随机出题
        Random rand = new Random();
        int level  = rand.nextInt(1,11);//10级
        int a = 1;
        int b = level*50;
        int num = rand.nextInt(a,b+1);
        int n = 0;
        //接收键盘输入
        Scanner sc = new Scanner(System.in);
        while(true){
            ++n;
            System.out.printf("请输入[%d-%d]：",a,b);
            int t = sc.nextInt();
            if(tb){
                System.out.printf("请重新%n");
                --n;
                continue;
            }
            if(t>num){
                System.out.printf("%d、太大了。%n",n);
            }else if(t=10){
                System.out.print("游戏结束");
                break;
            }
        }
    }
}

package cn.zh_jie;
import java.util.Random;
import java.util.Scanner;
public class GetNum {
    public static void main(String[] args) {
        Random r = new Random();
        Scanner sc = new Scanner(System.in);
        int level = r.nextInt(1, 11);//1--10级
        int a = 1;
        int b = level * 50;
        int n = 0;
        String str = null;
        int t;
        int num = r.nextInt(a, b + 1);
        while (true) {
            ++n;
            System.out.printf("请输入一个[%d-%d]整数:", a, b);
            try {
                 str = sc.next();
                 t = Integer.parseInt(str);
            } catch (Exception e) {
                System.out.printf("你输入的不是一个整数,请输入一个整数%n");
                --n;
                continue;
            }
            if (t > num) {
                System.out.println("猜大了");
            } else if (t < num) {
                System.out.println("你猜小了");
            } else {
                System.out.printf("%d 恭喜你, 猜对了(%d分).%n", n, (110 - n*10));//计分器
                break;
            }
            if (n >= 10) {
                System.out.print("游戏结束");
                break;
            }
        }
    }
}