diff --git a/doc/说明文档.md b/doc/说明文档.md
new file mode 100644
index 0000000..abd88c6
--- /dev/null
+++ b/doc/说明文档.md
@@ -0,0 +1,3 @@
+windows平台
+无参数设置
+编码GBK
\ No newline at end of file
diff --git a/src/account.cpp b/src/account.cpp
new file mode 100644
index 0000000..b1ee00b
--- /dev/null
+++ b/src/account.cpp
@@ -0,0 +1,24 @@
+#include"account.h"
+
+Authenticator::Authenticator(){
+    users = {
+        User("����1","123","Сѧ"),
+          User("����2","123","Сѧ"),
+          User("����3","123","Сѧ"),
+          User("����1","123","����"),
+          User("����2","123","����"),
+          User("����3","123","����"),
+          User("����1","123","����"),
+          User("����2","123","����"),
+          User("����3","123","����"),
+    };
+}
+
+User* Authenticator::authenticate(const std::string& username,const std::string& password){
+    for(User& user : users){
+      if(user.UserName == username&&user.Password == password){
+        return &user;
+      }
+    }
+    return nullptr;
+}
\ No newline at end of file
diff --git a/src/account.h b/src/account.h
new file mode 100644
index 0000000..586bfe6
--- /dev/null
+++ b/src/account.h
@@ -0,0 +1,15 @@
+#ifndef ACCOUNT_H
+#define ACCOUNT_H
+
+#include"case.h"
+#include<vector>
+
+class Authenticator{
+  private:
+    std::vector<User> users;
+  public:
+    User* authenticate(const std::string& username,const std::string& password);
+    Authenticator();
+};
+
+#endif
\ No newline at end of file
diff --git a/src/case.h b/src/case.h
new file mode 100644
index 0000000..6ee5bcb
--- /dev/null
+++ b/src/case.h
@@ -0,0 +1,25 @@
+#ifndef CASE_H
+#define CASE_H
+
+#include<string>
+
+class User{
+public:
+  std::string UserName;
+  std::string Password;
+  std::string UserType;
+
+  User(const std::string& uname,const std::string& pwd,const std::string& type)
+    :UserName(uname),Password(pwd),UserType(type){}
+};
+
+class Question{
+public:
+  int id;
+  std::string content;
+
+  Question(int ID,const std::string& cont)
+    :id(ID),content(cont){}
+};
+
+#endif
\ No newline at end of file
diff --git a/src/filemanage.cpp b/src/filemanage.cpp
new file mode 100644
index 0000000..5cc7ed2
--- /dev/null
+++ b/src/filemanage.cpp
@@ -0,0 +1,67 @@
+#include"filemanage.h"
+#include"tool.h"
+#include<fstream>
+#include<direct.h>
+#include<iostream>
+#include<dirent.h>
+
+Filemanage::Filemanage(const std::string&dir):baseDir(dir){
+  createDir(baseDir);
+}
+
+void Filemanage::createDir(const std::string& path){
+  _mkdir(path.c_str());
+}
+
+std::string Filemanage::getUserFolder(const std::string& username){
+  std::string userFolder = baseDir + "/" + username;
+  createDir(userFolder);
+  return userFolder;
+}
+
+std::string Filemanage::saveQuestions(const std::string& username,const std::vector<Question> questions){
+  std::string userFolder = getUserFolder(username);
+  std::string filename = tool::getCurrentTime() + ".txt";
+  std::string filepath = userFolder + "/" + filename;
+
+  std::ofstream userpath(filepath);
+  if(!userpath.is_open()){
+    std::cout<<"�޷������ļ�"<<filepath<<std::endl;
+  }
+
+  for(const Question question:questions){
+    userpath<<question.id<<"."<<question.content<<std::endl<<std::endl;
+  }
+
+  userpath.close();
+  return filepath;
+}
+
+std::set<std::string> Filemanage::getQuestions(const std::string&username){
+  std::set<std::string>productedQuestion;
+  std::string userFolder = getUserFolder(username);
+  DIR* dirstream = opendir(userFolder.c_str());
+  struct dirent* dir;
+  while((dir = readdir(dirstream)) != NULL){
+    std::string filename = dir->d_name;
+    if(filename.length() > 4&&filename.substr(filename.length() - 4) == ".txt"){
+      std::string filepath = userFolder + "/" + filename;
+      std::ifstream userpath;
+      userpath.open(filepath);
+      if(userpath.is_open()){
+        std::string OneQuestion;
+        while(getline(userpath,OneQuestion)){
+          OneQuestion = tool::EreaseEmpty(OneQuestion);
+          if(!OneQuestion.empty()&&OneQuestion.find('.') != std::string::npos){
+            int dotnum = OneQuestion.find('.');
+            OneQuestion = OneQuestion.substr(dotnum + 1,OneQuestion.size() - dotnum - 1);
+            productedQuestion.insert(OneQuestion);
+          }
+        }
+      }
+      userpath.close();
+    }
+  }
+  closedir(dirstream);
+  return productedQuestion;
+}
diff --git a/src/filemanage.h b/src/filemanage.h
new file mode 100644
index 0000000..935acc9
--- /dev/null
+++ b/src/filemanage.h
@@ -0,0 +1,20 @@
+#ifndef FILEMANAGE_H
+#define FILEMANAGE_H
+
+#include"case.h"
+#include<string>
+#include<set>
+#include<vector>
+
+class Filemanage{
+private:
+  std::string baseDir;
+  std::string getUserFolder(const std::string& username);
+  void createDir(const std::string& path);
+public:
+  Filemanage(const std::string& dir = "examquestions");
+  std::set<std::string>getQuestions(const std::string&username);
+  std::string saveQuestions(const std::string& username,const std::vector<Question> questions);
+};
+
+#endif
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..b52d390
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,133 @@
+#include<iostream>
+#include<regex>
+#include"account.h"
+#include"case.h"
+#include"filemanage.h"
+#include"question_product.h"
+#include"tool.h"
+
+class ExamSystem{
+private:
+  Authenticator authenticator;
+  Filemanage fileManage;
+  QuestionProduction questionProduction;
+  User* currentUser;
+  bool IsUser = false;
+  void SystemLogin();
+  void SystemProductQuestions();
+  void handleSwitchType(const std::string& newtype);
+  void ProductQuestion(int num);
+public:
+  void systemRun();
+};
+
+void ExamSystem::systemRun(){
+  std::cout<<"====��ӭʹ����Сѧ�����Զ�����ϵͳ===="<<std::endl;
+  while(1){
+    if(!IsUser){
+      SystemLogin();
+    }else{
+       SystemProductQuestions();
+    }
+  }
+};
+
+void ExamSystem::SystemLogin(){
+  std::cout<<"�������˺� �����¼��";
+  std::string Input;
+  getline(std::cin,Input);
+  Input = tool::EreaseEmpty(Input);
+  if(Input.empty()){
+    return ;
+  }
+  std::vector<std::string> tokens = tool::split(Input);
+  if(tokens.size() != 2){
+    std::cout<<std::endl<<"��������ȷ���û��������룺";
+    return ;
+  }
+  currentUser = authenticator.authenticate(tokens[0],tokens[1]);
+  if(currentUser == nullptr){
+    std::cout<<std::endl<<"��������ȷ���û��������룺";
+    return ;
+  }else{
+    std::cout<<std::endl<<"׼������"<<currentUser->UserType<<"��ѧ��Ŀ,������������Ŀ����(����-1���˳���ǰ�û������µ�¼)��";
+    IsUser = true;
+  }
+}
+
+void ExamSystem::SystemProductQuestions(){
+  std::string Input;
+  getline(std::cin,Input);
+  if(Input == "-1"){
+    currentUser = nullptr;
+    IsUser = false;
+    return ;
+  }
+
+  std::regex switchPattern("�л�Ϊ(\\S+)");
+  std::smatch match;
+
+  if(std::regex_match(Input,match,switchPattern)){
+    std::string newType = match[1].str();
+    handleSwitchType(newType);
+    return ;
+  }
+
+  if(!tool::isNumber(Input)){
+    std::cout<<"��������Ч�����֣�10~30��"<<std::endl;
+    return ;
+  }
+
+  int count = stoi(Input);
+  if(count < 10||count >30){
+    std::cout<<"��Ŀ������ΧӦΪ10~30"<<std::endl;
+    return ;
+  }
+
+  ProductQuestion(count);
+}
+
+void ExamSystem::handleSwitchType(const std::string& newtype){
+  std::vector<std::string> Levels = {"Сѧ","����","����"};
+  bool isLevel = false;
+
+  for(std::string Level:Levels){
+    if(Level == newtype){
+      isLevel = true;
+    }
+  }
+
+  if(!isLevel){
+    std::cout<<"������Сѧ�����к͸�������ѡ���е�һ��"<<std::endl;
+    return ;
+  }
+  currentUser->UserType = newtype;
+  std::cout<<"׼������"<<currentUser->UserType<<"��ѧ��Ŀ��������������Ŀ������";
+}
+
+void ExamSystem::ProductQuestion(int num){
+  std::cout<<"��������"<<num<<"��"<<currentUser->UserType<<"��ѧ��Ŀ�������ĵȴ�ovo"<<std::endl;
+ 
+  std::set<std::string> hadquestion = fileManage.getQuestions(currentUser->UserName);
+  std::vector<Question> newquestions;
+  int id = 1;
+  while(id <= num){
+    Question tempQuestion = questionProduction.questionProduction(id,currentUser->UserType);
+    int QuestionNum = hadquestion.size();
+    hadquestion.insert(tempQuestion.content);
+    if(QuestionNum != hadquestion.size()){
+        newquestions.push_back(tempQuestion);
+        id++;
+    }
+  }
+  std::string filename = fileManage.saveQuestions(currentUser->UserName,newquestions);
+  std::cout<<"�Ծ��ѳɹ����ɲ�����"<<std::endl;
+  std::cout<<"�ɹ�����"<<num<<"��"<<currentUser->UserType<<"��ѧ��Ŀ�������� "<<filename<<" �ļ���"<<std::endl;
+
+}
+
+int main(){
+    ExamSystem system;
+    system.systemRun();
+    return 0;
+}
\ No newline at end of file
diff --git a/src/question_product.cpp b/src/question_product.cpp
new file mode 100644
index 0000000..392ed9f
--- /dev/null
+++ b/src/question_product.cpp
@@ -0,0 +1,115 @@
+#include"question_product.h"
+#include<cstdlib>
+#include<ctime>
+
+int QuestionProduction::randnum(int min,int max){
+  int num = (rand()%(max - min + 1)) + min;
+  return num;
+}
+
+Question QuestionProduction::questionProduction(int questionId,const std::string& usertype){
+    int operationnum = randnum(1,5);
+    std::vector<int> operations;
+
+    for(int i = 0;i < operationnum;i++){
+        operations.push_back(randnum(1,100));
+    }
+
+    if(usertype == "Сѧ"){
+        return primaryProduction(questionId,operations);
+    }else if(usertype == "����"){
+        return juniorProduction(questionId,operations);
+    }else if(usertype == "����"){
+        return seniorProduction(questionId,operations);
+    }
+}
+
+
+Question QuestionProduction::primaryProduction(int questionId,const std::vector<int>&operation){
+  if(operation.size() == 1){
+    std::string expression = std::to_string(operation[0]);
+    return Question(questionId,expression);
+  }
+
+  std::string expression = std::to_string(operation[0]);
+
+  for(int i = 1;i < operation.size();i++){
+    std::string op = primaryWay[randnum(0,primaryWay.size() - 1)];
+    bool ifbracket = randnum(0,1);
+    if(ifbracket){
+      expression = "(" + expression + " " + op + " " + std::to_string(operation[i]) + ")";
+    }else{
+      expression = expression + " " + op + " " + std::to_string(operation[i]);
+    }
+    }
+
+  return Question(questionId,expression);
+}
+
+Question QuestionProduction::juniorProduction(int questionId,const std::vector<int>&operation){
+  std::string expression = std::to_string(operation[0]);
+  bool ifSpecialop = false;
+  
+  for(int i = 1;i < operation.size();i++){
+    if(randnum(0,1) == 1){
+        if(randnum(0,1) == 1){
+            expression = "��" + expression;
+        }else{
+            expression = "(" + expression + ")?";
+        }
+        ifSpecialop = true;
+    }
+    std::string op = primaryWay[randnum(0,primaryWay.size() - 1)];
+    bool ifbracket = randnum(0,1);
+    if(ifbracket){
+      expression = "(" + expression + " " + op + " " + std::to_string(operation[i]) + ")";
+    }else{
+      expression = expression + " " + op + " " + std::to_string(operation[i]);
+    }
+  }
+
+  if(!ifSpecialop){
+    if(randnum(0,1) == 1){
+            expression = "��" + expression;
+        }else{
+            expression = "(" + expression + ")?";
+        }
+  }
+
+  return Question(questionId,expression);
+}
+
+Question QuestionProduction::seniorProduction(int questionId,const std::vector<int>&operation){
+  std::string expression = std::to_string(operation[0]);
+  bool ifTrigonometric = false;
+
+  for(int i = 1;i < operation.size();i++){
+    if(randnum(0,1)){
+      std::vector<std::string>trigFuns = {"sin","cos","tan"};
+      std::string trigFun = trigFuns[randnum(0,2)];
+      expression = trigFun + "(" + expression + ")";
+      ifTrigonometric = true;
+    }else if(randnum(0,2) == 0){
+        if(randnum(0,1) == 1){
+            expression = "��" + expression;
+        }else{
+            expression = "(" + expression + ")?";
+        }
+    }
+    std::string op = primaryWay[randnum(0,primaryWay.size() - 1)];
+    bool ifbracket = randnum(0,1);
+    if(ifbracket){
+      expression = "(" + expression + " " + op + " " + std::to_string(operation[i]) + ")";
+    }else{
+      expression = expression + " " + op + " " + std::to_string(operation[i]);
+    }
+  }
+
+  if(!ifTrigonometric){
+    std::vector<std::string>trigFuns = {"sin","cos","tan"};
+    std::string trigFun = trigFuns[randnum(0,2)];
+    expression = trigFun + "(" + expression + ")";
+  }
+
+  return Question(questionId,expression);
+}
diff --git a/src/question_product.h b/src/question_product.h
new file mode 100644
index 0000000..0b8aed3
--- /dev/null
+++ b/src/question_product.h
@@ -0,0 +1,23 @@
+#ifndef QUESTION_PRODUCT_H
+#define QUESTION_PRODUCT_H
+
+#include"case.h"
+#include<vector>
+#include<string>
+
+class QuestionProduction{
+  private:
+    std::vector<std::string>primaryWay = {"+","-","*","/"};
+    std::vector<std::string>juniorWay = {"+","-","*","/","²","√"};
+    std::vector<std::string>seniorWay = {"+","-","*","/","²","√","sin","cos","tan"};
+
+    Question primaryProduction(int questionId,const std::vector<int>&operation);
+    Question juniorProduction(int questionId,const std::vector<int>&operation);
+    Question seniorProduction(int questionId,const std::vector<int>&operation);
+  public:
+    Question questionProduction(int questionId,const std::string& usertype);
+    int randnum(int min,int max);
+};
+
+
+#endif
\ No newline at end of file
diff --git a/src/tool.cpp b/src/tool.cpp
new file mode 100644
index 0000000..2659168
--- /dev/null
+++ b/src/tool.cpp
@@ -0,0 +1,58 @@
+#include"tool.h"
+#include<sstream>
+#include<ctime>
+
+
+std::vector<std::string>tool::split(const std::string& str){
+  std::istringstream iss(str);
+  std::vector<std::string> tokens;
+  std::string token;
+  std::istringstream tokenStream(str);
+
+  while(std::getline(tokenStream,token,' ')){
+    tokens.push_back(token);
+  }
+
+  return tokens;
+}
+
+bool tool::isNumber(const std::string& str){
+  if(str.empty()){
+    return false;
+  }
+
+  int start = 0;
+  if(str[0] == '-'){
+    if(str.size() == 1){
+        return false;
+    }
+    start = 1;
+  }
+
+  for(int i = start;i < str.size();i++){
+    if(!isdigit(str[i])){
+        return false;
+    }
+  }
+
+  return true;
+}
+
+std::string tool::getCurrentTime(){
+  time_t now = time(0);
+  tm* ltm = localtime(&now);
+  char buffer[80];
+  strftime(buffer,80,"%Y-%m-%d-%H-%M-%S",ltm);
+  std::string nowTime = buffer;
+  return nowTime;
+}
+
+std::string tool::EreaseEmpty(const std::string& question){
+  int start = question.find_first_not_of("\t\n\r");
+  int end = question.find_last_not_of("\t\n\r");
+  if(start == std::string::npos||end == std::string::npos){
+    return "";
+  }
+  
+  return question.substr(start,end - start + 1);
+}
\ No newline at end of file
diff --git a/src/tool.h b/src/tool.h
new file mode 100644
index 0000000..9555959
--- /dev/null
+++ b/src/tool.h
@@ -0,0 +1,17 @@
+#ifndef TOOL_H
+#define TOOL_H
+
+#include<string>
+#include<vector>
+
+namespace tool{
+    std::vector<std::string>split(const std::string& str);
+
+    bool isNumber(const std::string& str);
+
+    std::string getCurrentTime();
+
+    std::string EreaseEmpty(const std::string& question);
+}
+
+#endif
\ No newline at end of file