宿舍管理查询系统

宿舍管理查询系统，由于博主是小萌新，代码难免有冗余和错误的地方，如果您发现有什么不足之处或者错误，请留言，谢谢。博主会尽量回复！

C++使用IO流关联.txt文件

各模块之间的调用关系如下：

函数的调用关系反映了演示程序的层次结构：

代码如下：

#include<iostream>
#include<fstream>
#include<iomanip>
#include<cstdlib>
#include<string>
using namespace std;
#define MAXSIZE 100     //顺序表的最大长度
typedef struct {
    string name;        //姓名
    string id;          //学号
    string dormid;      //宿舍号
}Student;
typedef struct {
    Student r[MAXSIZE + 1];     //r[0]做单元哨兵
    int length;//长度
}SqList;


//用直接插入排序存入到student.txt文件中
void InsertSort(SqList &stu)
{
    int i, j;
    for (i = 2; i <= stu.length; i++)
        if (stu.r[i].id < stu.r[i - 1].id)
        {
            stu.r[0] = stu.r[i];
            stu.r[i] = stu.r[i - 1];
            for (j = i - 2; stu.r[0].id < stu.r[j].id; j--)
                stu.r[j + 1] = stu.r[j];
            stu.r[j + 1] = stu.r[0];
        }
    ofstream outfile("student.txt", ios::out);
    if (!outfile) {                             //如果文件打开失败
        cout << "文件打开失败" << endl;
        exit(1);
    }
    //outfile << "学号" << setw(8) << "姓名" << setw(8) << "宿舍号" << endl;
    outfile << stu.length << endl;

    for (i = 1; i <= stu.length; i++) {
        outfile << stu.r[i].id << setw(8) << stu.r[i].name << setw(8) << stu.r[i].dormid << endl;
    }
    cout << "学生信息数：" << stu.length << endl;
    outfile.close();
    cout << stu.length;
}

//创建学生信息(只能创建一次,不然会被刷新)
void InitList(SqList &stu)
{

    int i;
    cout << "学号" << setw(8) << "姓名" << setw(8) << "宿舍号" << endl;
    for (i = 1; i <= stu.length; i++) {
        cin >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
    }
    InsertSort(stu);
}

//增加学生信息
void Addstudent(SqList &stu)
{
    int n;
    int i = stu.length + 1;
    cout << "输入增加学生人数" << endl;
    cin >> n;
    cout << "学号" << setw(8) << "姓名" << setw(8) << "宿舍号" << endl;
    stu.length = stu.length + n;
    for (i; i <= stu.length; i++)
        cin >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
    InsertSort(stu);
}

//查询学生信息
void Findstudent(SqList &stu)
{
    string a, b, c;
    string name, id, dormid;
    cout << "1.学号查询  2.姓名查询  3.宿舍号查询" << endl;
    cout << "请输入你的查询选择（1~3）" << endl;
    int i;
    int n;
    cin >> n;
    if (n < 1 && n>3)
    {
        cout << "您输入有误，请重新输入：" << endl;
        Findstudent(stu);
    }
    if (1 == n)
    {
        cout << "请输入学生学号：" << endl;
        cin >> id;

        ifstream infile("student.txt", ios::in);//定义输入文件流对象，以输入方式打开磁盘文件"student.txt"
        infile >> stu.length;
        for (i = 1; i <= stu.length; i++) {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
        }
        infile.close();
        for (i = 1; i <= stu.length; i++)
        {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
            if (stu.r[i].id == id)
                cout << stu.r[i].id << setw(8) << stu.r[i].name << setw(8) << stu.r[i].dormid << endl;
        }

        infile.close();//关闭磁盘文件

    }
    if (2 == n)
    {
        cout << "请输入学生姓名：" << endl;
        cin >> name;

        ifstream infile("student.txt", ios::in);//定义输入文件流对象，以输入方式打开磁盘文件"student.txt"
        infile >> stu.length;
        for (i = 1; i <= stu.length; i++) {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
        }
        infile.close();
        for (i = 1; i <= stu.length; i++)
        {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
            if (stu.r[i].name == name)
                cout << stu.r[i].id << setw(8) << stu.r[i].name << setw(8) << stu.r[i].dormid << endl;
        }

        infile.close();//关闭磁盘文件
    }
    if (3 == n)
    {
        cout << "请输入学生宿舍号：" << endl;
        cin >> dormid;

        ifstream infile("student.txt", ios::in);//定义输入文件流对象，以输入方式打开磁盘文件"student.txt"
        infile >> stu.length;
        for (i = 1; i <= stu.length; i++) {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
        }
        infile.close();
        for (i = 1; i <= stu.length; i++)
        {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
            if (stu.r[i].dormid == dormid)
                cout << stu.r[i].id << setw(8) << stu.r[i].name << setw(8) << stu.r[i].dormid << endl;
        }
    }

}

//修改学生信息
void Renewstudent(SqList &stu)
{
    int n;
    string id, name, dormid;
    cout << "1.姓名  2.宿舍号" << endl;
    cout << "请输入您的选择（1~2）：" << endl;
    cin >> n;
    cout << "请输入需要修改学生的学号" << endl;
    cin >> id;
    if (n != 1 && n != 2)
    {
        cout << "输入有误，请重新输入：" << endl;
        Renewstudent(stu);
    }
    if (1 == n)
    {
        cout << "请输入修改姓名" << endl;
        cin >> name;
        int i = 0;
        ifstream infile("student.txt", ios::in);
        infile >> stu.length;
        for (i = 1; i <= stu.length; i++) {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
        }
        infile.close();
        for (i = 1; i <= stu.length; i++)//先找到再修改
        {
            if (stu.r[i].id == id)
            {
                stu.r[i].name = name;
                InsertSort(stu);
                return;
            }
        }
    }
    if (2 == n)
    {
        int i;
        cout << "请输入修改宿舍号" << endl;
        cin >> dormid;
        ifstream infile("student.txt", ios::in);
        infile >> stu.length;
        for (i = 1; i <= stu.length; i++) {
            infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
        }
        infile.close();
        for (i = 1; i <= stu.length; i++)//先找到再修改
        {
            if (stu.r[i].id == id)
            {
                stu.r[i].dormid = dormid;
                InsertSort(stu);
                return;
            }
        }
    }

}

//显示宿舍信息
void Showstudent(SqList &stu)
{
    string a, b, c;
    int i;
    cout << "学生的信息如下：" << endl;
    cout << "**********************************" << endl;
    ifstream infile("student.txt", ios::in);
    if (!infile) {                              //如果文件打开失败
        cout << "文件打开失败" << endl;
        exit(1);
    }
    /*infile >> a >> b >> c;//从磁盘文件读入
    cout << a << setw(8) << b << setw(8) << c << endl;//在显示器上显示*/
    infile >> stu.length;
    for (i = 1; i <= stu.length; i++) {
        infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
        cout << stu.r[i].id << setw(8) << stu.r[i].name << setw(8) << stu.r[i].dormid << endl;
    }
    infile.close();
}

//删除宿舍信息
void Deletstudent(SqList &stu)
{
    int  i, j;
    string a, b, c, id;
    cout << "请输入删除学生学号" << endl;
    cin >> id;
    ifstream infile("student.txt", ios::in);//定义输入文件流对象，以输入方式打开磁盘文件"student.txt"
    infile >> stu.length;
    for (i = 1; i <= stu.length; i++) {
        infile >> stu.r[i].id >> stu.r[i].name >> stu.r[i].dormid;
    }
    infile.close();
    for (i = 1; i <= stu.length; i++)//先找到再删除
    {
        if (stu.r[i].id == id)
        {
            for (j = i; j<stu.length; j++)
                stu.r[j] = stu.r[j + 1];
            stu.length--;
            InsertSort(stu);
            return;
        }
    }
}

//主函数
int main()
{
    SqList stu;
    int n;
    for (;;)
    {
        cout << "**************************宿舍管理查询软件**************************" << endl;
        cout << "1. 创建学生信息" << endl;                        //InitList
        cout << "2. 增加学生信息" << endl;                        //Addstudent    
        cout << "3. 查询学生信息" << endl;                        //Findstudent
        cout << "4. 显示学生信息" << endl;                        //Showstudent
        cout << "5. 修改学生信息" << endl;                        //Renewstudent
        cout << "6. 删除学生信息" << endl;                        //Deletstudent
        cout << "0. 退出系统" << endl;
        cout << "*******************************************************************" << endl;
        cout << "请输入你需要的操作（0~6）：" << endl;
        cin >> n;
        switch (n)
        {
        case 1:
            cout << "输入学生人数" << endl;
            cin >> stu.length;
            InitList(stu);
            cout << "###########################################" << endl;
            break;
        case 2:
            Addstudent(stu);
            cout << "###########################################" << endl;
            break;
        case 3:
            Findstudent(stu);
            cout << "###########################################" << endl;
            break;
        case 4:
            Showstudent(stu);
            cout << "###########################################" << endl;
            break;
        case 5:
            Renewstudent(stu);
            cout << "###########################################" << endl;
            break;
        case 6:
            Deletstudent(stu);
            cout << "###########################################" << endl;
            break;
        case 0:
            cout << "您已退出系统！" << endl;
            return 0;
        }

    }
    system("pause");
    return 0;
}