import java.util.Scanner;
public class VocabularyManager {
// 词汇数组（最大100个）、计数变量、扫描器
private static Word[] vocabulary = new Word[100];
private static int wordCount = 0;
private static Scanner scanner = new Scanner(System.in);
public static void main(String[] args) {
// 初始化5个测试词汇
initializeVocabulary();
// 登录流程
login();
}
// 初始化测试词汇
private static void initializeVocabulary() {
addNewWord(vocabulary, wordCount, "apple", "苹果");
addNewWord(vocabulary, wordCount, "banana", "香蕉");
addNewWord(vocabulary, wordCount, "cat", "猫");
addNewWord(vocabulary, wordCount, "dog", "狗");
addNewWord(vocabulary, wordCount, "egg", "鸡蛋");
}
// 登录逻辑：区分教师/学生
private static void login() {
System.out.println("=== 词汇管理系统登录 ===");
System.out.print("请选择角色(1-教师/2-学生)：");
int role = scanner.nextInt();
scanner.nextLine(); // 吸收换行符
System.out.print("用户名：");
String username = scanner.nextLine();
System.out.print("密码：");
String password = scanner.nextLine();
// 验证登录（硬编码账号）
if (role == 1 && username.equals("teacher") && password.equals("teach123")) {
System.out.println("教师登录成功！");
teacherMenu();
} else if (role == 2 && username.equals("student") && password.equals("stud123")) {
System.out.println("学生登录成功！");
studentMenu();
} else {
System.out.println("账号或密码错误，退出系统！");
}
}
// 教师菜单（全功能）
private static void teacherMenu() {
while (true) {
System.out.println("\n=== 教师菜单 ===");
System.out.println("1. 查看所有词汇");
System.out.println("2. 搜索词汇");
System.out.println("3. 添加词汇");
System.out.println("4. 删除词汇");
System.out.println("5. 修改词汇释义");
System.out.println("6. 退出");
System.out.print("请选择操作：");
int choice = scanner.nextInt();
scanner.nextLine();
switch (choice) {
case 1:
displayAllWords(vocabulary, wordCount);
break;
case 2:
System.out.print("请输入要搜索的单词：");
String searchKey = scanner.nextLine();
int index = searchWord(vocabulary, wordCount, searchKey);
if (index != -1) {
System.out.println("找到词汇：" + vocabulary[index]);
} else {
System.out.println("未找到该词汇！");
}
break;
case 3:
System.out.print("请输入新单词：");
String newWord = scanner.nextLine();
System.out.print("请输入释义：");
String newMeaning = scanner.nextLine();
addNewWord(vocabulary, wordCount, newWord, newMeaning);
System.out.println("词汇添加成功！");
break;
case 4:
System.out.print("请输入要删除的单词：");
String delWord = scanner.nextLine();
deleteWord(vocabulary, wordCount, delWord);
break;
case 5:
System.out.print("请输入要修改的单词：");
String updateWord = scanner.nextLine();
System.out.print("请输入新释义：");
String updateMeaning = scanner.nextLine();
updateWordMeaning(vocabulary, wordCount, updateWord, updateMeaning);
break;
case 6:
System.out.println("退出系统，再见！");
System.exit(0);
default:
System.out.println("无效选择，请重新输入！");
}
}
}
// 学生菜单（仅查看、搜索）
private static void studentMenu() {
while (true) {
System.out.println("\n=== 学生菜单 ===");
System.out.println("1. 查看所有词汇");
System.out.println("2. 搜索词汇");
System.out.println("3. 退出");
System.out.print("请选择操作：");
int choice = scanner.nextInt();
scanner.nextLine();
switch (choice) {
case 1:
displayAllWords(vocabulary, wordCount);
break;
case 2:
System.out.print("请输入要搜索的单词：");
String searchKey = scanner.nextLine();
int index = searchWord(vocabulary, wordCount, searchKey);
if (index != -1) {
System.out.println("找到词汇：" + vocabulary[index]);
} else {
System.out.println("未找到该词汇！");
}
break;
case 3:
System.out.println("退出系统，再见！");
System.exit(0);
default:
System.out.println("无效选择，请重新输入！");
}
}
}
// 显示所有词汇
public static void displayAllWords(Word[] vocab, int count) {
if (count == 0) {
System.out.println("词汇列表为空！");
return;
}
System.out.println("\n=== 词汇列表 ===");
for (int i = 0; i < count; i++) {
System.out.println((i + 1) + ". " + vocab[i]);
}
}
// 搜索词汇（返回索引，-1表示未找到）
public static int searchWord(Word[] vocab, int count, String keyWord) {
for (int i = 0; i < count; i++) {
if (vocab[i].getWord().equalsIgnoreCase(keyWord)) {
return i;
}
}
return -1;
}
// 添加新词汇
public static void addNewWord(Word[] vocab, int count, String word, String meaning) {
if (count < vocab.length) {
vocab[count] = new Word(word, meaning);
wordCount++;
} else {
System.out.println("词汇列表已满，无法添加！");
}
}
// 删除词汇
public static void deleteWord(Word[] vocab, int count, String word) {
int index = searchWord(vocab, count, word);
if (index == -1) {
System.out.println("未找到该词汇，删除失败！");
return;
}
// 数组元素前移
for (int i = index; i < count - 1; i++) {
vocab[i] = vocab[i + 1];
}
vocab[count - 1] = null; // 清空最后一个元素
wordCount--;
System.out.println("词汇删除成功！");
}
// 修改词汇释义
public static void updateWordMeaning(Word[] vocab, int count, String word, String newMeaning) {
int index = searchWord(vocab, count, word);
if (index == -1) {
System.out.println("未找到该词汇，修改失败！");
return;
}
vocab[index].setMeaning(newMeaning);
System.out.println("词汇释义修改成功！");
}
}