init

src/exam_manager.cpp

@@ -0,0 +1,60 @@
+#include "exam_manager.h"
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <ctime>
+#include <set>
+#include <vector>
+#include <direct.h>  // _mkdir (Windows)
+using namespace std;
+
+static set<string> history;
+
+ExamManager::ExamManager(QuestionGenerator* g, string folder)
+    : generator(g), userFolder(folder) {
+    // Windows 下创建目录（如果已存在则忽略）
+    _mkdir(userFolder.c_str());
+}
+
+void ExamManager::setGenerator(QuestionGenerator* g) {
+    generator = g;
+}
+
+bool ExamManager::checkDuplicate(const string& question) {
+    return history.count(question) > 0;
+}
+
+void ExamManager::generateExam(int numQuestions) {
+    vector<string> questions;
+
+    for (int i = 0; i < numQuestions; i++) {
+        string q;
+        do {
+            q = generator->generateQuestion();
+        } while (checkDuplicate(q));
+
+        history.insert(q);
+        questions.push_back(q);
+    }
+
+    time_t now = time(0);
+    tm ltm;
+    localtime_s(&ltm, &now);  // 安全版本
+
+    ostringstream filename;
+    filename << userFolder << "/";
+    filename << 1900 + ltm.tm_year << "-"
+        << 1 + ltm.tm_mon << "-"
+        << ltm.tm_mday << "-"
+        << ltm.tm_hour << "-"
+        << ltm.tm_min << "-"
+        << ltm.tm_sec << ".txt";
+
+    ofstream fout(filename.str());
+    for (int i = 0; i < (int)questions.size(); i++) {
+        fout << (i + 1) << ". " << questions[i] << "\n\n";
+    }
+    fout.close();
+
+    cout << "已生成试卷：" << filename.str() << endl;
+}

src/exam_manager.h

@@ -0,0 +1,20 @@
+#pragma once
+#ifndef EXAM_MANAGER_H
+#define EXAM_MANAGER_H
+
+#include "question.h"
+#include <string>
+using namespace std;
+
+class ExamManager {
+private:
+    QuestionGenerator* generator;
+    string userFolder;
+public:
+    ExamManager(QuestionGenerator* g, string folder);
+    void setGenerator(QuestionGenerator* g);
+    void generateExam(int numQuestions);
+    bool checkDuplicate(const string& question);
+};
+
+#endif

src/main.cpp

@@ -0,0 +1,71 @@
+#include <iostream>
+#include <ctime>
+#include "user.h"
+#include "question.h"
+#include "exam_manager.h"
+
+using namespace std;
+
+int main() {
+    srand((unsigned int)time(0));
+
+    while (true) {
+        string username, password;
+        cout << "请输入用户名 密码 (输入 exit 退出程序): ";
+        cin >> username;
+
+        if (username == "exit" || username == "退出") {
+            cout << "程序已退出。" << endl;
+            return 0;
+        }
+
+        cin >> password;
+
+        User* user = login(username, password);
+        if (!user) {
+            cout << "请输入正确的用户名、密码" << endl;
+            continue;
+        }
+
+        cout << "当前选择为 " << user->getType() << " 出题" << endl;
+
+        QuestionGenerator* generator = nullptr;
+        if (user->getType() == "小学") generator = new PrimaryGenerator();
+        else if (user->getType() == "初中") generator = new JuniorGenerator();
+        else generator = new SeniorGenerator();
+
+        ExamManager manager(generator, user->getName());
+
+        while (true) {
+            cout << "准备生成 " << user->getType()
+                << " 数学题目，请输入生成题目数量"
+                << "（输入 -1 退出当前用户，输入 -2 退出程序）:";
+
+            int n;
+            cin >> n;
+
+            if (n == -2) {
+                cout << "程序已退出。" << endl;
+                delete generator;
+                delete user;
+                return 0; // 彻底退出
+            }
+
+            if (n == -1) {
+                cout << "已退出当前用户，请重新登录。" << endl;
+                break; // 回到登录界面
+            }
+
+            if (n < 10 || n > 30) {
+                cout << "请输入 10-30 之间的数字！" << endl;
+                continue;
+            }
+
+            manager.generateExam(n);
+        }
+
+        delete generator;
+        delete user;
+    }
+    return 0;
+}

src/question.cpp

@@ -0,0 +1,73 @@
+#include "question.h"
+#include <cstdlib>
+#include <ctime>
+#include <sstream>
+#include <vector>
+using namespace std;
+
+static int randInt(int min, int max) {
+    return min + rand() % (max - min + 1);
+}
+
+// 小学：+ - * / ()
+string PrimaryGenerator::generateQuestion() {
+    int n = randInt(2, 4);
+    ostringstream oss;
+    for (int i = 0; i < n; i++) {
+        oss << randInt(1, 100);
+        if (i != n - 1) {
+            int op = randInt(0, 3);
+            char ops[] = { '+', '-', '*', '/' };
+            oss << " " << ops[op] << " ";
+        }
+    }
+    return oss.str();
+}
+
+// 初中：至少含平方或开根号
+string JuniorGenerator::generateQuestion() {
+    int n = randInt(2, 4);
+    ostringstream oss;
+    int specialPos = randInt(0, n - 1);
+    for (int i = 0; i < n; i++) {
+        int num = randInt(1, 20);
+        if (i == specialPos) {
+            if (randInt(0, 1))
+                oss << num << "^2";
+            else
+                oss << "√" << num;
+        }
+        else {
+            oss << randInt(1, 100);
+        }
+        if (i != n - 1) {
+            int op = randInt(0, 3);
+            char ops[] = { '+', '-', '*', '/' };
+            oss << " " << ops[op] << " ";
+        }
+    }
+    return oss.str();
+}
+
+// 高中：至少含 sin/cos/tan
+string SeniorGenerator::generateQuestion() {
+    int n = randInt(2, 4);
+    ostringstream oss;
+    int specialPos = randInt(0, n - 1);
+    vector<string> funcs = { "sin", "cos", "tan" };
+    for (int i = 0; i < n; i++) {
+        int num = randInt(1, 90);
+        if (i == specialPos) {
+            oss << funcs[randInt(0, 2)] << "(" << num << ")";
+        }
+        else {
+            oss << randInt(1, 100);
+        }
+        if (i != n - 1) {
+            int op = randInt(0, 3);
+            char ops[] = { '+', '-', '*', '/' };
+            oss << " " << ops[op] << " ";
+        }
+    }
+    return oss.str();
+}

src/question.h

@@ -0,0 +1,28 @@
+#ifndef QUESTION_H
+#define QUESTION_H
+
+#include <string>
+using namespace std;
+
+class QuestionGenerator {
+public:
+    virtual string generateQuestion() = 0;
+    virtual ~QuestionGenerator() {}
+};
+
+class PrimaryGenerator : public QuestionGenerator {
+public:
+    string generateQuestion() override;
+};
+
+class JuniorGenerator : public QuestionGenerator {
+public:
+    string generateQuestion() override;
+};
+
+class SeniorGenerator : public QuestionGenerator {
+public:
+    string generateQuestion() override;
+};
+
+#endif

src/user.cpp

@@ -0,0 +1,30 @@
+#include "user.h"
+#include <map>
+using namespace std;
+
+User::User(string u, string p, string t)
+    : username(u), password(p), type(t) {
+}
+
+string User::getName() const { return username; }
+string User::getType() const { return type; }
+
+bool User::validate(const string& u, const string& p) const {
+    return username == u && password == p;
+}
+
+// 预设账户表
+static map<string, pair<string, string>> accounts = {
+    {"张三1", {"123", "小学"}}, {"张三2", {"123", "小学"}}, {"张三3", {"123", "小学"}},
+    {"李四1", {"123", "初中"}}, {"李四2", {"123", "初中"}}, {"李四3", {"123", "初中"}},
+    {"王五1", {"123", "高中"}}, {"王五2", {"123", "高中"}}, {"王五3", {"123", "高中"}}
+};
+
+User* login(const string& u, const string& p) {
+    if (accounts.find(u) != accounts.end()) {
+        if (accounts[u].first == p) {
+            return new User(u, p, accounts[u].second);
+        }
+    }
+    return nullptr;
+}

src/user.h

@@ -0,0 +1,21 @@
+#ifndef USER_H
+#define USER_H
+
+#include <string>
+using namespace std;
+
+class User {
+private:
+    string username;
+    string password;
+    string type; // 小学/初中/高中
+public:
+    User(string u, string p, string t);
+    string getName() const;
+    string getType() const;
+    bool validate(const string& u, const string& p) const;
+};
+
+User* login(const string& u, const string& p);
+
+#endif