目录一、题目描述二、思路三、代码四、效果图
一、题目描述
二、思路
语法基础：StringBuilder 类似列表，可以更改元素。
package Practice;public class tt { public static void main(String[] args) { String str = "banana"; System.out.println(str.indexOf('z')); // -1 System.out.println(str.indexOf('a', 2)); // 3 StringBuilder words = new StringBuilder(); for (int i = 0; i < 5; i++) words.append('*'); // "*****" System.out.println(words.length()); // 5 System.out.println(words.indexOf("a"));// -1 System.out.println(words.indexOf("*", 1)); // 1 words.setCharAt(3, 'a'); // "***a*" System.out.println(words); }}
三、代码
package Practice;import java.util.Scanner;public class Guess { public static String words[] = {"banana", "telecommunication", "programming", "bupt"}; public static boolean[] guessed = new boolean[words.length]; // 判断猜过 public static int num_guessed = 0; // 猜过的单词数量 public static char keep; // 是否继续y or n public static void main(String[] args) {// for(int i = 0; i < guessed.length; i ++ ) System.out.println(guessed[i]); Scanner scanner = new Scanner(System.in); do{ // 随机产生要猜测的单词 ans int index = (int) (Math.random() * words.length); String ans = words[index]; // 再来一次时的重复检测 while(guessed[index] == true) { index = (int) (Math.random() * words.length); ans = words[index]; } // 初始化，StringBuilder类似list StringBuilder guessedWord = new StringBuilder(); for (int i = 0; i < ans.length(); i++) guessedWord.append('*'); int numberOfCorrectLettersGuessed = 0, numberOfMisses = 0; // 模拟过程 while (numberOfCorrectLettersGuessed < ans.length()) { System.out.print("(Guess) Enter a letter in word " + guessedWord + " > "); String s = scanner.nextLine(); char letter = s.charAt(0); if (guessedWord.indexOf(letter + "") >= 0) { // 猜中，但重复，不算错误次数 System.out.println("\t" + letter + " is already in the word"); } else if (ans.indexOf(letter) < 0) { // 猜错 System.out.println("\t" + letter + " is not in the word"); numberOfMisses++; } else { // 猜中，进行标记与赋值 int k = ans.indexOf(letter); while (k >= 0) { guessedWord.setCharAt(k, letter); numberOfCorrectLettersGuessed++; k = ans.indexOf(letter, k + 1); } } } System.out.println("The word is " + ans + ". You missed " + numberOfMisses + ((numberOfMisses <= 1) ? " time" : " times")); guessed[index] = true; num_guessed += 1; if(num_guessed < words.length) { System.out.print("Do you want to guess for another word? Enter y or n> "); keep = scanner.nextLine().charAt(0); } }while(keep == 'y' && num_guessed < words.length); if(keep == 'y') System.out.println("Perfect!!!"); else System.out.println("You have guessed " + num_guessed + ((num_guessed <= 1) ? " word~" : " words~")); }}
四、效果图
全部猜完
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