Time in the Subway: 猜数字小游戏（GuessNum）--Java代码实现

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/*需求：开发一个猜数字的小游戏； * 描述：系统产生一个1-100之间的随机数(含0和100），请猜出这个数字是多少。     * 1.产生随机数     * 2.接收键盘输入数字     * 3.判断大小，输出结果。     * 4.用户一局最多7次猜的机会，猜不中则游戏结束。     * 4.每局游戏结束后要能给出用户选择：再来一局还是结束游戏。*/

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import java.util.Random;import java.util.Scanner;public class GuessNumOptimize {    Scanner sc = new Scanner(System.in);    static int times = 6;    public static void main(String[] args) {        System.out.println("Hello, MZ. WLCOME HERE! ^_^ ");        System.out.println("This is a game which invites you to guess a number between 1 and 100,include 1 and 100.");        System.out.println("And you have at most " + times + "  times to try in each inning.");        System.out.print("Press 1 to Start.  ");        System.out.println("Press 2 to Quit. : ");        Scanner sc = new Scanner(System.in);        flag: while (true) {            System.out.println("Please enter your choice :");            int button = sc.nextInt();            switch (button) {            case 1:                System.out.println("Start Now!");                Random r = new Random();                int answer = r.nextInt(100) + 1;                // 产生随机数，判断答案,一局结束。                judgeNum(answer);                break;            case 2:                System.out.println("Game Over!");                System.out.println("欢迎下次再来！");                break flag;            // System.exit(0);            default:                System.out.println("Are u kidding？");                System.out.print("Press 1 to try again.  ");                System.out.println("Press 2 to Quit. : ");                break;            }        }    }

// 定义判断方法：judgeNum(int answer)    public static void judgeNum(int answer) {        for (int i = times; i >= 1; i--) {            System.out.println("------------------------");            System.out.println("Please enter your number:");            Scanner sc = new Scanner(System.in);            int enterNum = sc.nextInt();            // 判断大小            if (enterNum > answer) {                if (i == 1) {                    System.out.println("很遗憾，你没有机会了！");                    endPrompt();                    break;                } else {                    System.out.println("你猜大了，往小了猜试试？");                    System.out.println("你还有" + (i - 1) + "次机会。加油！");                }            } else if (enterNum < answer) {                if (i == 1 ) {                    System.out.println("很遗憾，你没有机会了！");                    endPrompt();                    break;                } else {                    System.out.println("你猜小了，往大了猜试试？");                    System.out.println("你还有" + (i - 1) + "次机会。加油！");                }            } else {                System.out.println("恭喜你，猜中啦。答案是：" + enterNum + "。");                System.out.println("你用了" + (times - i +1) + "次就猜对了，好厉害！*^_^* ");                endPrompt();                break;            }        }    }

//每局结束的提示语public static void endPrompt(){            System.out.println("再来一局？");            System.out.println("Press 1 to Try Again.");            System.out.println("Press 2 to Quit.");    }

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