diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index f68d109..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,29 +0,0 @@
-### IntelliJ IDEA ###
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store
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diff --git a/.idea/.gitignore b/.idea/.gitignore
deleted file mode 100644
index 359bb53..0000000
--- a/.idea/.gitignore
+++ /dev/null
@@ -1,3 +0,0 @@
-# 默认忽略的文件
-/shelf/
-/workspace.xml
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
deleted file mode 100644
index ec4453f..0000000
--- a/.idea/encodings.xml
+++ /dev/null
@@ -1,7 +0,0 @@
-
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-
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diff --git a/.idea/misc.xml b/.idea/misc.xml
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index 6f29fee..0000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-
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-
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diff --git a/.idea/modules.xml b/.idea/modules.xml
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index d26ca7f..0000000
--- a/.idea/modules.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-
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-
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diff --git a/.idea/vcs.xml b/.idea/vcs.xml
deleted file mode 100644
index d843f34..0000000
--- a/.idea/vcs.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-
-
-
-
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diff --git a/MathSystem.iml b/MathSystem.iml
deleted file mode 100644
index c90834f..0000000
--- a/MathSystem.iml
+++ /dev/null
@@ -1,11 +0,0 @@
-
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..58a19f0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+# wgll926MathSystem
+
diff --git a/src/Main.java b/src/Main.java
deleted file mode 100644
index 3b77df8..0000000
--- a/src/Main.java
+++ /dev/null
@@ -1,393 +0,0 @@
-//TIP 要运行代码，请按 或
-// 点击装订区域中的 图标。
-import java.io.BufferedReader;
-import java.io.BufferedWriter;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
-import java.util.*;
-
-public class Main {
- enum Level {
- 小学, 初中, 高中
- }
-
- static class Account {
- final String username;
- final String password;
- final Level level;
-
- Account(String username, String password, Level level) {
- this.username = username;
- this.password = password;
- this.level = level;
- }
- }
-
- private static final Map USER_MAP = new HashMap<>();
- private static final String OUTPUT_ROOT = "papers"; // 每个账号一个子文件夹
- private static final Random RANDOM = new Random();
-
- public static void main(String[] args) {
- initAccounts();
- BufferedReader reader = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
- while (true) {
- Account login = loginLoop(reader);
- if (login == null) {
- break;
- }
- Level currentLevel = login.level;
- System.out.println("当前选择为" + currentLevel + "出题");
- // 登录后的工作循环
- while (true) {
- System.out.println("准备生成" + currentLevel + "数学题目，请输入生成题目数量（输入-1将退出当前用户，重新登录）");
- String line = readLineTrim(reader);
- if (line == null) return; // EOF
- // 支持命令：切换为XX
- if (line.startsWith("切换为")) {
- String target = line.substring("切换为".length()).trim();
- Level targetLevel = parseLevel(target);
- if (targetLevel == null) {
- System.out.println("请输入小学、初中和高中三个选项中的一个");
- continue;
- }
- currentLevel = targetLevel;
- continue;
- }
- int count;
- try {
- count = Integer.parseInt(line);
- } catch (NumberFormatException e) {
- System.out.println("请输入10-30之间的整数，或-1退出登录，或输入‘切换为XX’");
- continue;
- }
- if (count == -1) {
- break; // 退出当前账号，重新登录
- }
- if (count < 10 || count > 30) {
- System.out.println("题目数量应为10-30之间（含），或-1退出登录");
- continue;
- }
-
- // 生成题目并去重
- Set history = loadHistoryQuestions(login.username);
- List paper = generateUniquePaper(currentLevel, count, history);
- // 保存
- try {
- File saved = savePaper(login.username, paper);
- System.out.println("已生成并保存：" + saved.getAbsolutePath());
- } catch (IOException e) {
- System.out.println("保存失败：" + e.getMessage());
- }
- }
- }
- }
-
- private static void initAccounts() {
- // 小学三个账号
- USER_MAP.put("张三1", new Account("张三1", "123", Level.小学));
- USER_MAP.put("张三2", new Account("张三2", "123", Level.小学));
- USER_MAP.put("张三3", new Account("张三3", "123", Level.小学));
- // 初中三个账号
- USER_MAP.put("李四1", new Account("李四1", "123", Level.初中));
- USER_MAP.put("李四2", new Account("李四2", "123", Level.初中));
- USER_MAP.put("李四3", new Account("李四3", "123", Level.初中));
- // 高中三个账号
- USER_MAP.put("王五1", new Account("王五1", "123", Level.高中));
- USER_MAP.put("王五2", new Account("王五2", "123", Level.高中));
- USER_MAP.put("王五3", new Account("王五3", "123", Level.高中));
- }
-
- private static Account loginLoop(BufferedReader reader) {
- while (true) {
- System.out.println("请输入用户名和密码（用空格分隔），或按Ctrl+D退出：");
- String line = readLineTrim(reader);
- if (line == null) return null; // EOF 退出
- String[] parts = line.split("\\s+");
- if (parts.length != 2) {
- System.out.println("请按格式输入");
- continue;
- }
- String username = parts[0];
- String password = parts[1];
- Account acc = USER_MAP.get(username);
- if (acc != null && Objects.equals(acc.password, password)) {
- return acc;
- }
- System.out.println("请输入正确的用户名、密码");
- }
- }
-
- private static String readLineTrim(BufferedReader reader) {
- try {
- String s = reader.readLine();
- if (s == null) return null;
- return s.trim();
- } catch (IOException e) {
- return null;
- }
- }
-
- private static Level parseLevel(String s) {
- for (Level lv : Level.values()) {
- if (lv.name().equals(s)) return lv;
- }
- return null;
- }
-
- private static List generateUniquePaper(Level level, int count, Set history) {
- Set set = new LinkedHashSet<>();
- int attempts = 0;
- int maxAttempts = count * 200; // 足够多的尝试次数以避免死循环
- while (set.size() < count && attempts < maxAttempts) {
- String q = generateQuestion(level);
- attempts++;
- if (!history.contains(q) && !set.contains(q)) {
- set.add(q);
- }
- }
- if (set.size() < count) {
- System.out.println("注意：因去重限制，仅生成" + set.size() + "题");
- }
- return new ArrayList<>(set);
- }
-
- private static String generateQuestion(Level level) {
- // 统一表达式末尾不加等号，以字符串完全相等进行去重
- return switch (level) {
- case 小学 -> generatePrimary();
- case 初中 -> generateJunior();
- case 高中 -> generateSenior();
- default -> generatePrimary();
- };
- }
-
- private static String generatePrimary() {
- // 仅使用 +, *, / 和括号，运算数 1-5 个，范围 1-100
- int operands = 2 + RANDOM.nextInt(4); // 2-5
- List tokens = new ArrayList<>();
- int first = 1 + RANDOM.nextInt(100);
- tokens.add(String.valueOf(first));
- for (int i = 1; i < operands; i++) {
- char op = pickOperator("+*/");
- int n = 1 + RANDOM.nextInt(100);
- if (op == '/') {
- // 让被除数尽可能能整除，依据上一个纯数字令除数为其因子
- int prevNumber = extractLastPureNumber(tokens);
- if (prevNumber > 0) {
- n = pickDivisor(prevNumber);
- }
- }
- tokens.add(" " + op + " ");
- tokens.add(String.valueOf(n));
- }
- maybeInsertParentheses(tokens);
- StringBuilder sb = new StringBuilder();
- for (String tk : tokens) sb.append(tk);
- return sb.toString();
- }
-
- private static String generateJunior() {
- // 至少包含一个 平方 或 开根号；允许 + - * / 和括号
- int operands = 2 + RANDOM.nextInt(4); // 2-5
- List tokens = new ArrayList<>();
- String first = String.valueOf(1 + RANDOM.nextInt(100));
- tokens.add(first);
- for (int i = 1; i < operands; i++) {
- char op = pickOperator("+-*/");
- String n = String.valueOf(1 + RANDOM.nextInt(100));
- tokens.add(" " + op + " ");
- tokens.add(n);
- }
- // 强制至少包含一个 平方 或 根号
- ensureJuniorFeature(tokens);
- maybeInsertParentheses(tokens);
- StringBuilder sb = new StringBuilder();
- for (String tk : tokens) sb.append(tk);
- return sb.toString();
- }
-
- private static String generateSenior() {
- // 至少包含一个 sin/cos/tan；允许 + - * / 和括号
- int operands = 3 + RANDOM.nextInt(3); // 3-5
- List tokens = new ArrayList<>();
- tokens.add(String.valueOf(1 + RANDOM.nextInt(100)));
- for (int i = 1; i < operands; i++) {
- char op = pickOperator("+-*/");
- String n = String.valueOf(1 + RANDOM.nextInt(100));
- tokens.add(" " + op + " ");
- tokens.add(n);
- }
- ensureSeniorFeature(tokens);
- maybeInsertParentheses(tokens);
- StringBuilder sb = new StringBuilder();
- for (String tk : tokens) sb.append(tk);
- return sb.toString();
- }
-
- private static char pickOperator(String candidates) {
- int idx = RANDOM.nextInt(candidates.length());
- return candidates.charAt(idx);
- }
-
- private static int lastNumberForDivision(CharSequence currentExpr) {
- // 粗略解析，找到最后一个数字（用于生成可整除的除法）
- int i = currentExpr.length() - 1;
- while (i >= 0 && !Character.isDigit(currentExpr.charAt(i))) i--;
- int end = i;
- while (i >= 0 && Character.isDigit(currentExpr.charAt(i))) i--;
- int start = i + 1;
- if (start <= end) {
- return Integer.parseInt(currentExpr.subSequence(start, end + 1).toString());
- }
- return 1 + RANDOM.nextInt(100);
- }
-
- private static int pickDivisor(int dividend) {
- dividend = Math.abs(dividend);
- if (dividend == 0) return 1;
- List divisors = new ArrayList<>();
- for (int d = 1; d <= Math.min(dividend, 100); d++) {
- if (dividend % d == 0) {
- divisors.add(d);
- }
- }
- return divisors.get(RANDOM.nextInt(divisors.size()));
- }
-
- private static String buildExpressionWithParentheses(List numbers, List ops) {
- // 已不再使用该构造器于主流程，保留供兼容
- List tokens = new ArrayList<>();
- tokens.add(String.valueOf(numbers.get(0)));
- for (int i = 0; i < ops.size(); i++) {
- char op = ops.get(i);
- int n = numbers.get(i + 1);
- tokens.add(" " + op + " ");
- tokens.add(String.valueOf(n));
- }
- maybeInsertParentheses(tokens);
- StringBuilder sb = new StringBuilder();
- for (String tk : tokens) sb.append(tk);
- return sb.toString();
- }
-
- private static void maybeInsertParentheses(List tokens) {
- int parenCount = RANDOM.nextInt(3); // 0,1,2 对
- for (int k = 0; k < parenCount; k++) {
- int terms = (tokens.size() + 1) / 2; // 操作数个数
- if (terms < 3) break;
- int leftIndex = 0;
- int rightIndex = 0;
- for (int t = 0; t < 10; t++) {
- int li = RANDOM.nextInt(terms - 1);
- int ri = li + 1 + RANDOM.nextInt(terms - li - 1);
- leftIndex = li * 2;
- rightIndex = ri * 2;
- if (rightIndex - leftIndex >= 4) break; // 至少一个运算符
- }
- tokens.add(leftIndex, "(");
- tokens.add(rightIndex + 2, ")");
- }
- }
-
- private static int extractLastPureNumber(List tokens) {
- for (int i = tokens.size() - 1; i >= 0; i--) {
- String tk = tokens.get(i).trim();
- if (tk.matches("\\d+")) {
- return Integer.parseInt(tk);
- }
- }
- return -1;
- }
-
- private static void ensureJuniorFeature(List tokens) {
- boolean hasSquareOrSqrt = false;
- for (String tk : tokens) {
- if (tk.contains("^2") || tk.contains("√")) { hasSquareOrSqrt = true; break; }
- }
- if (!hasSquareOrSqrt) {
- // 选择一个操作数位置，50% 概率平方，50% 概率开根号
- List operandIndexes = new ArrayList<>();
- for (int i = 0; i < tokens.size(); i += 2) operandIndexes.add(i);
- if (operandIndexes.isEmpty()) return;
- int idxToken = operandIndexes.get(RANDOM.nextInt(operandIndexes.size()));
- String val = tokens.get(idxToken).trim();
- if (RANDOM.nextBoolean()) {
- // 平方
- tokens.set(idxToken, val + "^2");
- } else {
- // 开根号
- tokens.set(idxToken, "√(" + val + ")");
- }
- }
- }
-
- private static void ensureSeniorFeature(List tokens) {
- boolean hasTrig = false;
- for (String tk : tokens) {
- if (tk.contains("sin") || tk.contains("cos") || tk.contains("tan")) { hasTrig = true; break; }
- }
- if (!hasTrig) {
- List operandIndexes = new ArrayList<>();
- for (int i = 0; i < tokens.size(); i += 2) operandIndexes.add(i);
- if (operandIndexes.isEmpty()) return;
- int idxToken = operandIndexes.get(RANDOM.nextInt(operandIndexes.size()));
- String val = tokens.get(idxToken).trim();
- String func;
- switch (RANDOM.nextInt(3)) {
- case 0: func = "sin"; break;
- case 1: func = "cos"; break;
- default: func = "tan"; break;
- }
- tokens.set(idxToken, func + "(" + val + ")");
- }
- }
-
- private static Set loadHistoryQuestions(String username) {
- Set set = new HashSet<>();
- File folder = new File(OUTPUT_ROOT, username);
- if (!folder.exists() || !folder.isDirectory()) return set;
- File[] files = folder.listFiles((dir, name) -> name.endsWith(".txt"));
- if (files == null) return set;
- for (File f : files) {
- try (BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f), StandardCharsets.UTF_8))) {
- String line;
- while ((line = br.readLine()) != null) {
- line = line.trim();
- if (line.isEmpty()) continue;
- int dot = line.indexOf('.') ;
- if (dot > 0) {
- String maybe = line.substring(dot + 1).trim();
- if (!maybe.isEmpty()) set.add(maybe);
- }
- }
- } catch (IOException ignored) {
- }
- }
- return set;
- }
-
- private static File savePaper(String username, List questions) throws IOException {
- File folder = new File(OUTPUT_ROOT, username);
- if (!folder.exists()) {
- if (!folder.mkdirs()) throw new IOException("无法创建目录：" + folder.getAbsolutePath());
- }
- LocalDateTime now = LocalDateTime.now();
- DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-M-d-H-m-s");
- String filename = now.format(formatter) + ".txt";
- File out = new File(folder, filename);
- try (BufferedWriter bw = new BufferedWriter(new FileWriter(out, StandardCharsets.UTF_8))) {
- for (int i = 0; i < questions.size(); i++) {
- bw.write((i + 1) + ". " + questions.get(i));
- bw.newLine();
- bw.newLine();
- }
- }
- return out;
- }
-}
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