本文实例为大家分享了C++实现宿舍管理查询系统的具体代码，供大家参考，具体内容如下
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：
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#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;} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/DialogD/article/details/77758238
