# studentsystem

**Repository Path**: lily_2006/studentsystem

## Basic Information

- **Project Name**: studentsystem
- **Description**: 学生管理系统
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-10-09
- **Last Updated**: 2025-10-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <iomanip>
using namespace std;

// 学生数据结构体
struct Student {
    int id;             // 学号
    string name;        // 姓名
    string className;   // 班级
    double score;       // 成绩
    string workStatus;  // 工作状态
    string department;  // 部门
};

// 用户结构体
struct User {
    string username;    // 用户名
    string password;    // 密码
    string role;        // 角色
};

// 全局变量
vector<Student> students;  // 学生数据顺序表
vector<User> users;        // 用户数据顺序表
User currentUser;          // 当前登录用户

// 函数声明
void initSystem();
void displayMainMenu();
void userRegister();
bool userLogin();
void studentManagement();
void addStudent();
void displayStudents();
void modifyStudent();
void deleteStudent();
void searchStudent();
void analyzeStudents();
void sortStudents();
void saveData();
void loadData();

// 主函数
int main() {
    initSystem();  // 系统初始化
    loadData();    // 加载数据
    
    int choice;
    bool loggedIn = false;
    
    cout << "=== 学生工作管理系统 ===" << endl;
    
    do {
        if (!loggedIn) {
            // 登录前菜单
            cout << "\n========== 系统菜单 ==========" << endl;
            cout << "1. 用户注册" << endl;
            cout << "2. 用户登录" << endl;
            cout << "3. 退出系统" << endl;
            cout << "==============================" << endl;
            cout << "请选择操作: ";
            cin >> choice;
            
            switch(choice) {
                case 1:
                    userRegister();
                    break;
                case 2:
                    loggedIn = userLogin();
                    if (loggedIn) {
                        cout << "登录成功！欢迎 " << currentUser.username << endl;
                    } else {
                        cout << "登录失败！用户名或密码错误。" << endl;
                    }
                    break;
                case 3:
                    saveData();
                    cout << "感谢使用学生工作管理系统！" << endl;
                    break;
                default:
                    cout << "无效选择，请重新输入！" << endl;
            }
        } else {
            // 登录后菜单
            displayMainMenu();
            cout << "请选择操作: ";
            cin >> choice;
            
            switch(choice) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    displayStudents();
                    break;
                case 3:
                    modifyStudent();
                    break;
                case 4:
                    deleteStudent();
                    break;
                case 5:
                    searchStudent();
                    break;
                case 6:
                    analyzeStudents();
                    break;
                case 7:
                    sortStudents();
                    break;
                case 8:
                    loggedIn = false;
                    cout << "已退出登录！" << endl;
                    break;
                case 9:
                    saveData();
                    cout << "感谢使用学生工作管理系统！" << endl;
                    return 0;
                default:
                    cout << "无效选择，请重新输入！" << endl;
            }
        }
    } while(true);
    
    return 0;
}

// 系统初始化
void initSystem() {
    // 添加默认管理员用户
    users.push_back({"admin", "123456", "admin"});
}

// 显示主菜单
void displayMainMenu() {
    cout << "\n========== 学生工作管理系统 ==========" << endl;
    cout << "1. 增加学生信息" << endl;
    cout << "2. 展示学生信息" << endl;
    cout << "3. 修改学生信息" << endl;
    cout << "4. 删除学生信息" << endl;
    cout << "5. 查找学生信息" << endl;
    cout << "6. 数据分析统计" << endl;
    cout << "7. 学生信息排序" << endl;
    cout << "8. 退出登录" << endl;
    cout << "9. 退出系统" << endl;
    cout << "=====================================" << endl;
}

// 用户注册功能
void userRegister() {
    User newUser;
    
    cout << "\n--- 用户注册 ---" << endl;
    cout << "请输入用户名: ";
    cin >> newUser.username;
    
    // 检查用户名是否已存在
    for(const auto& user : users) {
        if(user.username == newUser.username) {
            cout << "用户名已存在，请重新选择！" << endl;
            return;
        }
    }
    
    cout << "请输入密码: ";
    cin >> newUser.password;
    newUser.role = "user";  // 默认角色为普通用户
    
    users.push_back(newUser);
    cout << "注册成功！" << endl;
}

// 用户登录功能
bool userLogin() {
    string username, password;
    
    cout << "\n--- 用户登录 ---" << endl;
    cout << "请输入用户名: ";
    cin >> username;
    cout << "请输入密码: ";
    cin >> password;
    
    // 在顺序结构中查找匹配的用户
    for(const auto& user : users) {
        if(user.username == username && user.password == password) {
            currentUser = user;
            return true;
        }
    }
    
    return false;
}

// 增加学生信息
void addStudent() {
    Student newStudent;
    
    cout << "\n--- 增加学生信息 ---" << endl;
    cout << "请输入学号: ";
    cin >> newStudent.id;
    
    // 检查学号是否重复
    for(const auto& student : students) {
        if(student.id == newStudent.id) {
            cout << "学号已存在，请重新输入！" << endl;
            return;
        }
    }
    
    cout << "请输入姓名: ";
    cin >> newStudent.name;
    cout << "请输入班级: ";
    cin >> newStudent.className;
    cout << "请输入成绩: ";
    cin >> newStudent.score;
    cout << "请输入工作状态: ";
    cin >> newStudent.workStatus;
    cout << "请输入部门: ";
    cin >> newStudent.department;
    
    students.push_back(newStudent);
    cout << "学生信息添加成功！" << endl;
}

// 展示学生信息
void displayStudents() {
    if(students.empty()) {
        cout << "没有学生信息！" << endl;
        return;
    }
    
    cout << "\n--- 学生信息列表 ---" << endl;
    cout << left << setw(10) << "学号" << setw(15) << "姓名" 
         << setw(15) << "班级" << setw(10) << "成绩" 
         << setw(15) << "工作状态" << setw(15) << "部门" << endl;
    cout << string(80, '-') << endl;
    
    for(const auto& student : students) {
        cout << left << setw(10) << student.id << setw(15) << student.name
             << setw(15) << student.className << setw(10) << student.score
             << setw(15) << student.workStatus << setw(15) << student.department << endl;
    }
}

// 修改学生信息
void modifyStudent() {
    int id;
    cout << "\n--- 修改学生信息 ---" << endl;
    cout << "请输入要修改的学生学号: ";
    cin >> id;
    
    for(auto& student : students) {
        if(student.id == id) {
            cout << "找到学生信息，当前详情:" << endl;
            cout << "姓名: " << student.name << ", 班级: " << student.className 
                 << ", 成绩: " << student.score << ", 工作状态: " << student.workStatus 
                 << ", 部门: " << student.department << endl;
            
            cout << "请输入新的姓名: ";
            cin >> student.name;
            cout << "请输入新的班级: ";
            cin >> student.className;
            cout << "请输入新的成绩: ";
            cin >> student.score;
            cout << "请输入新的工作状态: ";
            cin >> student.workStatus;
            cout << "请输入新的部门: ";
            cin >> student.department;
            
            cout << "学生信息修改成功！" << endl;
            return;
        }
    }
    
    cout << "未找到该学号的学生信息！" << endl;
}

// 删除学生信息
void deleteStudent() {
    int id;
    cout << "\n--- 删除学生信息 ---" << endl;
    cout << "请输入要删除的学生学号: ";
    cin >> id;
    
    for(auto it = students.begin(); it != students.end(); ++it) {
        if(it->id == id) {
            students.erase(it);
            cout << "学生信息删除成功！" << endl;
            return;
        }
    }
    
    cout << "未找到该学号的学生信息！" << endl;
}

// 查找学生信息
void searchStudent() {
    int choice;
    cout << "\n--- 查找学生信息 ---" << endl;
    cout << "1. 按学号查找" << endl;
    cout << "2. 按姓名查找" << endl;
    cout << "3. 按班级查找" << endl;
    cout << "请选择查找方式: ";
    cin >> choice;
    
    switch(choice) {
        case 1: {
            int id;
            cout << "请输入学号: ";
            cin >> id;
            
            for(const auto& student : students) {
                if(student.id == id) {
                    cout << "查找结果:" << endl;
                    cout << "学号: " << student.id << ", 姓名: " << student.name 
                         << ", 班级: " << student.className << ", 成绩: " << student.score 
                         << ", 工作状态: " << student.workStatus << ", 部门: " << student.department << endl;
                    return;
                }
            }
            cout << "未找到该学号的学生信息！" << endl;
            break;
        }
        case 2: {
            string name;
            cout << "请输入姓名: ";
            cin >> name;
            
            bool found = false;
            for(const auto& student : students) {
                if(student.name == name) {
                    if(!found) {
                        cout << "查找结果:" << endl;
                        found = true;
                    }
                    cout << "学号: " << student.id << ", 姓名: " << student.name 
                         << ", 班级: " << student.className << ", 成绩: " << student.score 
                         << ", 工作状态: " << student.workStatus << ", 部门: " << student.department << endl;
                }
            }
            if(!found) cout << "未找到该姓名的学生信息！" << endl;
            break;
        }
        case 3: {
            string className;
            cout << "请输入班级: ";
            cin >> className;
            
            bool found = false;
            for(const auto& student : students) {
                if(student.className == className) {
                    if(!found) {
                        cout << "查找结果:" << endl;
                        found = true;
                    }
                    cout << "学号: " << student.id << ", 姓名: " << student.name 
                         << ", 班级: " << student.className << ", 成绩: " << student.score 
                         << ", 工作状态: " << student.workStatus << ", 部门: " << student.department << endl;
                }
            }
            if(!found) cout << "未找到该班级的学生信息！" << endl;
            break;
        }
        default:
            cout << "无效选择！" << endl;
    }
}