中小学生试卷自动生成程序

doc/README.md

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+# self-project
+Windows shell可正常运行
+

src/6.cpp

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+#include <iostream>
+#include <string>
+#include <vector>
+#include <sstream>
+#include <algorithm>
+#include <cctype>
+#include <cstdlib>
+#include <ctime>
+#include <fstream>
+//第五版问题：?未知 
+#include <set>
+#include <dirent.h>
+
+#ifdef _WIN32
+#include <direct.h>
+#include <windows.h>
+#else
+#include <sys/stat.h>
+#include <sys/types.h>
+#endif
+ 
+using namespace std;
+
+// 用户类型枚举
+enum UserType {
+    PRIMARY,    // 小学
+    JUNIOR,     // 初中
+    SENIOR,      // 高中
+    UNKNOWN    	 //未知 
+};
+
+// 用户结构体
+struct User {
+    string username;
+    string password;
+    UserType type;
+};
+
+//加载所有历史题目，便于查重 
+set<string> loadExistingQuestions(const string& userDir) {
+    set<string> existingQuestions;//使用集合避免重复 
+    
+    #ifdef _WIN32
+    // Windows版本的目录遍历
+    WIN32_FIND_DATA findFileData;
+    HANDLE hFind = FindFirstFile((userDir + "\\*.txt").c_str(), &findFileData);
+    
+    if (hFind != INVALID_HANDLE_VALUE) {
+        do {
+            if (!(findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
+                string filename = userDir + "\\" + findFileData.cFileName;
+                ifstream file(filename);
+                string line;
+                while (getline(file, line)) {
+                    if (!line.empty() && line.find(".") != string::npos) {
+                        // 提取题目内容（去掉题号）
+                        size_t dotPos = line.find(".");
+                        if (dotPos != string::npos) {
+                            string question = line.substr(dotPos + 2); // 跳过". "
+                            existingQuestions.insert(question);
+                        }
+                    }
+                }
+                file.close();
+            }
+        } while (FindNextFile(hFind, &findFileData));
+        FindClose(hFind);
+    }
+    #endif
+    
+    return existingQuestions;
+}
+
+//检查题目是否唯一 
+bool isQuestionUnique(const string& question, const set<string>& existingQuestions) {
+    return existingQuestions.find(question) == existingQuestions.end();
+}
+
+//字符串分割函数 
+vector<string> split(const string& str, char delimiter) {
+    vector<string> tokens;
+    string token;
+    istringstream tokenStream(str);
+    
+    while (getline(tokenStream, token, delimiter)) {
+        if (!token.empty()) {
+            tokens.push_back(token);
+        }
+    }
+    return tokens;
+}
+
+// 字符串修剪函数 - 去除字符串首尾的空白字符
+string trim(const string& str) {
+    size_t start = str.find_first_not_of(" \t\n\r");
+    if (start == string::npos) return "";
+    
+    size_t end = str.find_last_not_of(" \t\n\r");
+    return str.substr(start, end - start + 1);
+}
+
+// 字符串转小写函数 - 将字符串转换为小写形式
+string toLower(const string& str) {
+    string result = str;
+    transform(result.begin(), result.end(), result.begin(), ::tolower);
+    return result;
+}
+
+//数字验证函数 
+bool isNumber(const string& str) {
+    if (str.empty()) return false;
+    
+    if (str == "-1") return true;
+    
+    for (size_t i = 0; i < str.length(); i++) {
+        if (!isdigit(str[i])) return false;
+    }
+    return true;
+}
+
+// 获取当前时间字符串 - 生成格式为"年-月-日-时-分-秒"的时间字符串
+string getCurrentTimeString() {
+    time_t now = time(0);
+    struct tm* localTime = localtime(&now);
+    
+    char buffer[20];
+    strftime(buffer, sizeof(buffer), "%Y-%m-%d-%H-%M-%S", localTime);
+    return string(buffer);
+}
+
+//创建目录函数 
+bool createDirectory(const string& path) {
+    #ifdef _WIN32
+    return _mkdir(path.c_str()) == 0;
+    #else
+    return mkdir(path.c_str(), 0755) == 0;
+    #endif
+}
+
+//用户类型转中文字符串 
+string getUserTypeString(UserType type) {
+    switch (type) {
+        case PRIMARY: return "小学";
+        case JUNIOR: return "初中";
+        case SENIOR: return "高中";
+        default: return "未知";
+    }
+}
+
+//将中文字符串转换为对应枚举 
+UserType parseUserType(const string& typeStr) {
+    string lowerType = toLower(typeStr);
+    if (lowerType == "小学") return PRIMARY;
+    if (lowerType == "初中") return JUNIOR;
+    if (lowerType == "高中") return SENIOR;
+    return UNKNOWN;
+}
+
+// 用户管理类
+class UserManager {
+private:
+    vector<User> users;
+    
+    void initializeUsers() {
+        // 小学账号
+        users.push_back((User){"张三1", "123", PRIMARY});
+        users.push_back((User){"张三2", "123", PRIMARY});
+        users.push_back((User){"张三3", "123", PRIMARY});
+        
+        // 初中账号
+        users.push_back((User){"李四1", "123", JUNIOR});
+        users.push_back((User){"李四2", "123", JUNIOR});
+        users.push_back((User){"李四3", "123", JUNIOR});
+        
+        // 高中账号
+        users.push_back((User){"王五1", "123", SENIOR});
+        users.push_back((User){"王五2", "123", SENIOR});
+        users.push_back((User){"王五3", "123", SENIOR});
+    }
+
+public:
+	//构造函数初始化 
+    UserManager() {
+        initializeUsers();
+    }
+    
+    //验证用户名密码是否正确 
+    User* authenticate(const string& username, const string& password) {
+        for (size_t i = 0; i < users.size(); i++) {
+            if (users[i].username == username && users[i].password == password) {
+                return &users[i];
+            }
+        }
+        return NULL;
+    }
+};
+
+//抽象题目生成器接口类，定义基本操作 
+class IQuestionGenerator {
+public:
+    virtual ~IQuestionGenerator() {}
+    virtual void setUserType(UserType type) = 0;
+    virtual string generateQuestion() = 0;
+    virtual vector<string> generatePaper(int questionCount, const string& username) = 0;
+};
+
+// 具体题目生成器实现类，继承接口 
+class QuestionGenerator : public IQuestionGenerator {
+private:
+    UserType currentType;
+    set<string> existingQuestions;//历史题目集合用于查重 
+    
+    int generateOperand() {
+        return rand() % 100 + 1;//操作数范围1-100 
+    }
+    
+    //生成表达式 
+    string generateExpression(int operandCount) {
+        string operators[] = {"+", "-", "*", "/"};
+        vector<int> operands;//存放操作数 
+        
+        for (int i = 0; i < operandCount; i++) {
+            operands.push_back(generateOperand());
+        }
+        
+        stringstream ss;
+        ss << operands[0];
+        
+        for (int i = 1; i < operandCount; i++) {
+            string op = operators[rand() % 4];//随机运算符 
+            ss << " " << op << " " << operands[i];
+        }
+        
+        return ss.str();
+    }
+    
+    //生成小学题目 
+    string generatePrimaryQuestion() {
+        int operandCount = rand() % 4 + 2; // 小学要求2-5个操作数
+        return generateExpression(operandCount);
+    }
+    
+    //生成初中题目 
+    string generateJuniorQuestion() {
+        int operandCount = rand() % 5 + 1;
+        string expression = generateExpression(operandCount);
+        
+        // 确保至少有一个平方或开根号
+        if (rand() % 2 == 0) {
+            return expression +"^2"; // 平方
+        } else {
+            return "√" + expression; // 开根号
+        }
+    }
+    
+    //生成高中题目 
+    string generateSeniorQuestion() {
+        int operandCount = rand() % 5 + 1;
+        string expression = generateExpression(operandCount);
+        
+        // 确保至少有一个三角函数
+        string trigFunctions[] = {"sin", "cos", "tan"};
+        string trigFunc = trigFunctions[rand() % 3];
+        
+        return trigFunc + "(" + expression + ")";
+    }
+
+public:
+	//构造函数，初始化随机种子 
+    QuestionGenerator() : currentType(PRIMARY) {
+        srand(time(0));
+    }
+    
+    //设置用户类型 
+    void setUserType(UserType type) override {//重载 
+        currentType = type;
+    }
+    
+    // 设置历史题目，便于查重 
+    void setExistingQuestions(const set<string>& questions) {
+        existingQuestions = questions;
+    }
+    
+    //生成单个题目 
+    string generateQuestion() override {
+        string question;
+        int attempts = 0;
+        const int MAX_ATTEMPTS = 100; // 防止无限循环
+        
+        // 循环生成题目直到生成不重复的题目或达到最大尝试次数
+        do {
+            switch (currentType) {
+                case PRIMARY:
+                    question = generatePrimaryQuestion();
+                    break;
+                case JUNIOR:
+                    question = generateJuniorQuestion();
+                    break;
+                case SENIOR:
+                    question = generateSeniorQuestion();
+                    break;
+                default:
+                    question = generatePrimaryQuestion();
+            }
+            attempts++;
+        } while (!isQuestionUnique(question, existingQuestions) && attempts < MAX_ATTEMPTS);
+        
+        // 将新题目添加到历史记录中
+        existingQuestions.insert(question);
+        return question;
+    }
+    
+    //生成整张试卷（指定数量题目） 
+    vector<string> generatePaper(int questionCount, const string& username) override {//重载 
+        vector<string> paper;
+        
+        for (int i = 1; i <= questionCount; i++) {
+            string question = generateQuestion();
+            stringstream ss;
+            ss << i << ". " << question;//题号 
+            paper.push_back(ss.str());
+        }
+        
+        return paper;
+    }
+};
+
+// 试卷系统主类
+class PaperSystem {
+private:
+    UserManager userManager;
+    QuestionGenerator questionGenerator;
+    User* currentUser;
+    string currentDirectory;       
+    set<string> existingQuestions;//登录时加载历史题目 
+    
+    //用户登录函数 
+    bool login() {
+        cout << "请输入用户名和密码（用空格隔开）：";
+        
+        string input;
+        getline(cin, input);
+        
+        vector<string> tokens = split(input, ' ');
+        if (tokens.size() != 2) {
+            cout << "请输入正确的用户名、密码" << endl;
+            return false;
+        }
+        
+        string username = trim(tokens[0]);
+        string password = trim(tokens[1]);
+        
+        currentUser = userManager.authenticate(username, password);
+        if (currentUser == NULL) {
+            cout << "请输入正确的用户名、密码" << endl;
+            return false;
+        }
+        
+        questionGenerator.setUserType(currentUser->type);
+        
+        // 加载历史题目用于查重
+        string userDir = currentDirectory + "/" + currentUser->username;
+        createDirectory(userDir);
+        existingQuestions = loadExistingQuestions(userDir);
+        questionGenerator.setExistingQuestions(existingQuestions);
+        
+        cout << "当前选择为" << getUserTypeString(currentUser->type) << "出题" << endl;
+        
+        return true;
+    }
+    
+    //处理命令行的"切换为xx"命令 
+    bool processSwitchCommand(const string& input) {
+        if (input.length() < 7) return false; // "切换为XX" 至少7个字符
+        
+        string prefix = input.substr(0, 6);
+        if (toLower(prefix) != "切换为") return false;
+        
+        string typeStr = trim(input.substr(6));
+        UserType newType = parseUserType(typeStr);
+        
+        //切换类型不合法 
+        if (newType == UNKNOWN) {
+            cout << "请输入小学、初中和高中三个选项中的一个" << endl;
+            return true; // 命令格式正确但内容错误
+        }
+        
+        // 永久切换用户类型
+        currentUser->type = newType;
+        questionGenerator.setUserType(newType);
+        cout << "准备生成" << getUserTypeString(newType) << "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）：";
+        
+        return true;
+    }
+    
+    // 处理输入并验证题目数量
+    int getValidQuestionCount() {
+        string input;
+        getline(cin, input);
+        input = trim(input);
+        
+        if (processSwitchCommand(input)) {
+            return -3; // 特殊代码表示切换类型
+        }
+        
+        if (input == "-1") {
+            return -1; // 退出代码
+        }
+        
+        if (!isNumber(input)) {
+            cout << "请输入有效的数字！" << endl;
+            return -2;
+        }
+        
+        int questionCount = atoi(input.c_str());
+        if (questionCount < 10 || questionCount > 30) {
+            cout << "题目数量范围是10-30，请重新输入。" << endl;
+            return -2;
+        }
+        
+        return questionCount;
+    }
+    
+    // 生成并保存试卷，更新历史题目，便于查重 
+    void generateAndSavePaper(int questionCount) {
+        vector<string> paper = questionGenerator.generatePaper(questionCount, currentUser->username);
+        string filename = getCurrentTimeString() + ".txt";
+        string userDir = currentDirectory + "/" + currentUser->username;
+        createDirectory(userDir);
+        string fullPath = userDir + "/" + filename;
+        savePaperToFile(paper, fullPath);
+        cout << "试卷已生成并保存到: " << fullPath << endl;
+        
+        // 更新历史题目记录（从文件中重新加载，确保包含最新题目）
+        existingQuestions = loadExistingQuestions(userDir);
+        questionGenerator.setExistingQuestions(existingQuestions);
+    }
+    
+    // 
+    void generatePaper() {
+        cout << "准备生成" << getUserTypeString(currentUser->type) 
+              << "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）：";
+        
+        while (true) {
+            int questionCount = getValidQuestionCount();
+            
+            if (questionCount == -3) { // 切换类型
+                continue;
+            }
+            
+            if (questionCount == -2) { // 需要重新输入
+                cout << "准备生成" << getUserTypeString(currentUser->type) 
+                      << "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）：";
+                continue;
+            }
+            
+            if (questionCount == -1) { // 退出
+                currentUser = NULL;
+                return;
+            }
+            
+            // 有效的题目数量
+            generateAndSavePaper(questionCount);
+            break;
+        }
+    }
+    
+    //保存试卷到文件 - 将题目列表写入文件
+    void savePaperToFile(const vector<string>& paper, const string& filename) {
+        ofstream file(filename.c_str());
+        if (file.is_open()) {
+            for (size_t i = 0; i < paper.size(); i++) {
+                file << paper[i] << endl;
+                if (i < paper.size() - 1) {
+                    file << endl; // 题目之间空一行
+                }
+            }
+            file.close();
+        }
+    }
+    
+    void userSession() {
+        while (currentUser != NULL) {
+            generatePaper();
+        }
+    }
+
+public:
+    PaperSystem() : currentUser(NULL) {
+        currentDirectory = "papers";
+        createDirectory(currentDirectory);
+    }
+    
+    //系统主循环-程序入口 
+    void run() {
+        cout << "=== 中小学数学卷子自动生成程序 ===" << endl;
+        
+        while (true) {
+            if (currentUser == NULL) {
+                if (!login()) {
+                    continue;
+                }
+            }
+            
+            userSession();
+        }
+    }
+};
+
+int main() {
+    PaperSystem system;
+    system.run();
+    return 0;
+}