java实战之猜字小游戏

java实战之猜字小游戏

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

中途退出

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