开发一个简单的课表查询系统，实现以下基本功能： 【基本功能】 课表数据文件。每个课表的信息包括：学期、专业班级、时间、科目、教室等基本信息。 能够按给定班级、时间等信息进行查找并显示相关信息。 能够添加、删除或修改课表中的课程信息。 能够按照学期或班级信息对课表进行排序，并存入文件中。 【扩展功能】 可以按照自己对课表查询系统的需求理解进行扩展。比如：（1）权限处理 （2）模糊查询（3）综合查询（4）统计功能等 。运用多文件，用C++写出完整代码。

好的，这是一个课表查询系统，需要用到C++语言和多文件编程技术。首先，我们需要设计一个课程类Course，用于保存每个课程的信息。其属性包括学期、专业班级、时间、科目、教室等基本信息。同时，我们还需要设计一个课表类Schedule，用于保存所有课程信息。其成员函数包括添加、删除、修改、查找、排序等操作。具体实现如下：

Course.h文件：

#pragma once
#include <string>
using namespace std;

class Course {
public:
    string semester;
    string major;
    string className;
    string time;
    string subject;
    string classroom;

    Course(string s, string m, string cn, string t, string sub, string c) :
        semester(s), major(m), className(cn), time(t), subject(sub), classroom(c) {}
};

Schedule.h文件：

#pragma once
#include <vector>
#include "Course.h"
using namespace std;

class Schedule {
private:
    vector<Course> courses;

public:
    void addCourse(Course course);
    void deleteCourse(int index);
    void modifyCourse(int index, Course course);
    void findCourse(string className, string time);
    void sortSchedule(string method);
    void saveToFile(string fileName);
    void loadFromFile(string fileName);
};

Schedule.cpp文件：

#include "Schedule.h"
#include <fstream>
#include <algorithm>
#include <iostream>
using namespace std;

void Schedule::addCourse(Course course)
{
    courses.push_back(course);
    cout << "添加成功！" << endl;
}

void Schedule::deleteCourse(int index)
{
    if (index >= courses.size()) {
        cout << "该课程不存在！" << endl;
        return;
    }
    courses.erase(courses.begin() + index);
    cout << "删除成功！" << endl;
}

void Schedule::modifyCourse(int index, Course course)
{
    if (index >= courses.size()) {
        cout << "该课程不存在！" << endl;
        return;
    }
    courses[index] = course;
    cout << "修改成功！" << endl;
}

void Schedule::findCourse(string className, string time)
{
    cout << "查询结果如下：" << endl;
    for (int i = 0; i < courses.size(); i++) {
        if (courses[i].className == className && courses[i].time == time) {
            cout << "学期：" << courses[i].semester << "，专业：" << courses[i].major
                << "，班级：" << courses[i].className << "，时间：" << courses[i].time
                << "，科目：" << courses[i].subject << "，教室：" << courses[i].classroom << endl;
        }
    }
}

bool compareSemester(const Course& a, const Course& b)
{
    return a.semester < b.semester;
}

bool compareClassName(const Course& a, const Course& b)
{
    return a.className < b.className;
}

void Schedule::sortSchedule(string method)
{
    if (method == "semester") {
        sort(courses.begin(), courses.end(), compareSemester);
        cout << "按学期排序成功！" << endl;
    }
    else if (method == "className") {
        sort(courses.begin(), courses.end(), compareClassName);
        cout << "按班级排序成功！" << endl;
    }
    else {
        cout << "排序失败，排序方法不存在！" << endl;
    }
}

void Schedule::saveToFile(string fileName)
{
    ofstream outfile(fileName);
    if (!outfile.is_open()) {
        cout << "文件打开失败！" << endl;
        return;
    }
    for (int i = 0; i < courses.size(); i++) {
        outfile << courses[i].semester << "," << courses[i].major << ","
            << courses[i].className << "," << courses[i].time << ","
            << courses[i].subject << "," << courses[i].classroom << endl;
    }
    outfile.close();
    cout << "保存成功！" << endl;
}

void Schedule::loadFromFile(string fileName)
{
    ifstream infile(fileName);
    if (!infile.is_open()) {
        cout << "文件打开失败！" << endl;
        return;
    }
    string line;
    while (getline(infile, line)) {
        string semester, major, className, time, subject, classroom;
        int pos1 = line.find(",");
        semester = line.substr(0, pos1);
        int pos2 = line.find(",", pos1 + 1);
        major = line.substr(pos1 + 1, pos2 - pos1 - 1);
        pos1 = pos2;
        pos2 = line.find(",", pos1 + 1);
        className = line.substr(pos1 + 1, pos2 - pos1 - 1);
        pos1 = pos2;
        pos2 = line.find(",", pos1 + 1);
        time = line.substr(pos1 + 1, pos2 - pos1 - 1);
        pos1 = pos2;
        pos2 = line.find(",", pos1 + 1);
        subject = line.substr(pos1 + 1, pos2 - pos1 - 1);
        pos1 = pos2;
        classroom = line.substr(pos1 + 1);
        courses.push_back(Course(semester, major, className, time, subject, classroom));
    }
    infile.close();
    cout << "读取成功！" << endl;
}

main.cpp文件：

#include <iostream>
#include "Schedule.h"
using namespace std;

void displayMenu()
{
    cout << "欢迎使用课表查询系统！" << endl;
    cout << "1. 添加课程" << endl;
    cout << "2. 删除课程" << endl;
    cout << "3. 修改课程" << endl;
    cout << "4. 查询课程" << endl;
    cout << "5. 排序课表" << endl;
    cout << "6. 保存课表到文件" << endl;
    cout << "7. 从文件读取课表" << endl;
    cout << "0. 退出系统" << endl;
}

int main()
{
    Schedule schedule;
    while (true) {
        displayMenu();
        int choice;
        cout << "请输入操作编号：";
        cin >> choice;
        switch (choice) {
        case 1: {
            string semester, major, className, time, subject, classroom;
            cout << "请输入学期：";
            cin >> semester;
            cout << "请输入专业：";
            cin >> major;
            cout << "请输入班级：";
            cin >> className;
            cout << "请输入时间：";
            cin >> time;
            cout << "请输入科目：";
            cin >> subject;
            cout << "请输入教室：";
            cin >> classroom;
            Course course(semester, major, className, time, subject, classroom);
            schedule.addCourse(course);
            break;
        }
        case 2: {
            int index;
            cout << "请输入要删除的课程编号：";
            cin >> index;
            schedule.deleteCourse(index);
            break;
        }
        case 3: {
            int index;
            cout << "请输入要修改的课程编号：";
            cin >> index;
            string semester, major, className, time, subject, classroom;
            cout << "请输入学期：";
            cin >> semester;
            cout << "请输入专业：";
            cin >> major;
            cout << "请输入班级：";
            cin >> className;
            cout << "请输入时间：";
            cin >> time;
            cout << "请输入科目：";
            cin >> subject;
            cout << "请输入教室：";
            cin >> classroom;
            Course course(semester, major, className, time, subject, classroom);
            schedule.modifyCourse(index, course);
            break;
        }
        case 4: {
            string className, time;
            cout << "请输入班级：";
            cin >> className;
            cout << "请输入时间：";
            cin >> time;
            schedule.findCourse(className, time);
            break;
        }
        case 5: {
            string method;
            cout << "请输入排序方法：";
            cin >> method;
            schedule.sortSchedule(method);
            break;
        }
        case 6: {
            string fileName;
            cout << "请输入文件名：";
            cin >> fileName;
            schedule.saveToFile(fileName);
            break;
        }
        case 7: {
            string fileName;
            cout << "请输入文件名：";
            cin >> fileName;
            schedule.loadFromFile(fileName);
            break;
        }
        case 0:
            cout << "谢谢使用，再见！" << endl;
            return 0;
        default:
            cout << "操作编号错误，请重新输入！" << endl;
            break;
        }
    }
    return 0;
}

以上就是一个简单的课表查询系统的代码实现，支持基本功能和扩展功能，包括添加、删除、修改、查找、排序、保存到文件和读取文件等操作。