64 lines
2.2 KiB
Java
64 lines
2.2 KiB
Java
package day03;
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/**
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* 第 3 天：猜数字游戏 —— while 循环 + if 判断
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* 目标：掌握 while 循环和条件判断的配合使用
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*
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* 游戏规则：程序随机生成 1-100 的数字，玩家最多猜 7 次，
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* 每次猜测后提示"大了"或"小了"，猜中或次数用完则结束。
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*/
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import java.util.Scanner;
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import java.util.Random;
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public class GuessNumber {
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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Random random = new Random();
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// 生成 1~100 的随机整数
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int target = random.nextInt(100) + 1;
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int maxAttempts = 7; // 最多猜 7 次
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int attempts = 0; // 已猜次数
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boolean guessed = false;
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System.out.println("========== 猜数字游戏 ==========");
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System.out.println("我已想好一个 1~100 之间的数字，你有 " + maxAttempts + " 次机会！");
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// while 循环：当还有剩余次数且未猜中时继续
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while (attempts < maxAttempts && !guessed) {
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attempts++;
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System.out.print("\n第 " + attempts + " 次猜测，请输入数字: ");
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int guess = scanner.nextInt();
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if (guess < 1 || guess > 100) {
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System.out.println("请输入 1~100 之间的数字！");
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attempts--; // 不浪费这次机会
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continue; // 跳过本次循环剩余代码
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}
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if (guess == target) {
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System.out.println("\n🎉 恭喜你猜对了！答案就是 " + target + "！");
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System.out.println("你一共猜了 " + attempts + " 次。");
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guessed = true;
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} else if (guess > target) {
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System.out.println("太大了！");
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} else {
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System.out.println("太小了！");
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}
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// 提示剩余次数
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if (!guessed && attempts < maxAttempts) {
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System.out.println("还有 " + (maxAttempts - attempts) + " 次机会。");
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}
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}
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// 没猜中的情况
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if (!guessed) {
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System.out.println("\n😢 很遗憾，次数用完了！正确答案是 " + target + "。");
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}
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scanner.close();
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}
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}
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