人工智能-项目实践-信息管理系统-c++课程设计 学生信息管理系统

#include "Student.h" #include<iostream> using namespace std; string filename("untitled"); void show(student *p); Student::Student() { head = new student; head->stu_id = 0; head->stu_name = "No name"; head->stu_next = NULL; } Student::~Student() { student *p = head, *q; while (p) { q = p; p = q->stu_next; delete q; } } //注册函数 void Student::logon() { student tmp; cout << "学号 (0 结束输入 ): "; cin >> tmp.stu_id; while (tmp.stu_id) { if (findById(tmp.stu_id) == NULL) { cout << "姓 名: "; cin >> tmp.stu_name; cout << "年 龄: "; cin >> tmp.stu_age; cout << "性 别: "; cin >> tmp.stu_sex; cout << "籍 贯: "; cin >> tmp.stu_birth; cout << "系 别："; cin >> tmp.stu_department; cout << "专 业："; cin >> tmp.stu_major; cout << "班 级："; cin >> tmp.stu_class; cout << "手 机: "; cin >> tmp.stu_tel; cout << "电子邮箱: "; cin >> tmp.stu_email; insert(tmp); } else cout << "重复的学号: " << tmp.stu_id << endl; cout << "学号 (0 结束输入): "; cin >> tmp.stu_id; } } //查找函数 void Student::Query() const { int select; unsigned id; string name; string sex; string email; student *p; cout << "1、按学号查询\n2、按姓名查询\n3、按性别查询\n4、按Email查询\n0、返回\n"; cin >> select; switch (select) { case 1: cout << "请输入学号: "; cin >> id; if ((p = findById(id))) show(p->stu_next); break; case 2: cout << "请输入姓名: "; cin >> name; if ((p = findByName(name))) show(p->stu_next); break; case 3:cout << "请输入性别："; cin >> sex; if ((p = findBySex(sex))) show(p->stu_next); break; case 4:cout << "请输入Email："; cin >> email; if ((p = findByEmail(email))) show(p->stu_next); break; case 0: return; default: cout << "选择错误. \n"; } } student *Student::findByEmail(const string &email) const { student *p; for (p = head; p->stu_next; p = p->stu_next) if (p->stu_next->stu_email == email) return p; cout << "没有找到输入的Email" << endl; return NULL; } student *Student::findBySex(const string &sex) const { student *p; for (p = head; p->stu_next; p = p->stu_next) if (p->stu_next->stu_sex == sex) return p; cout << "没有找到输入的性别的用户" << endl; return NULL; } student *Student::findByName(const string &name) const { student *p; for (p = head; p->stu_next; p = p->stu_next) if (p->stu_next->stu_name == name) return p; cout << "没有找到输入的姓名" << endl; return NULL; } student *Student::findById(unsigned id) const { student *p; for (p = head; p->stu_next; p = p->stu_next) if (p->stu_next->stu_id == id) return p; return NULL; } //删除函数 void Student::deleteBy() { int select; unsigned id; string name; cout << "1、按学号删除\n2、按姓名删除\n0、返回\n"; cin >> select; switch (select) { case 1: cout << "请输入学号: "; cin >> id; deleteById(id); break; case 2: cout << "请输入姓名: "; cin >> name; deleteByName(name); break; case 0: return; default: cout << "选择错误. \n"; } } bool Student::deleteById(unsigned &id) { student *q, *p; p = findById(id); if (p == NULL) { cout << "没有找到学号是 \"" << id << "\" 的学生，删除失败! \n"; return false; } q = p->stu_next; p->stu_next = q->stu_next; delete q; cout << "成功删除 " << id << " 的信息. \n"; return true; } bool Student::deleteByName(string &name) { student *q, *p; p = findByName(name); if (p == NULL) { cout << "没有找到姓名是 \"" << name << "\" 的学生, 删除失败! \n"; return false; } q = p->stu_next; p->stu_next = q->stu_next; delete q; cout << "成功删除 " << name << " 的信息. \n"; return true; } //修改函数 void Student::modify() { int select; cout << "1、按学号修改\n2、按姓名修改\n0、返回\n"; cin >> select; switch (select) { case 1: if (modifyById()) cout << "修改成功. \n"; break; case 2: if (modifyByName()) cout << "修改成功. \n"; break; case 0: return; default: cout << "选择错误. \n"; } } bool Student::modifyById() { student *p; unsigned id; cout << "输入要修改的学号: "; cin >> id; p = findById(id); if (p == NULL) { cout << "没有找到学号是 \"" << id << "\" 的学生, 修改失败! \n"; return false; } createByStdin(1,*(p->stu_next)); return true; } bool Student::modifyByName() { student *p; string name; cout << "输入要修改人的姓名: "; cin >> name; p = findByName(name); if (p == NULL) { cout << "没有找到姓名是 \"" << name << "\" 的学生, 修改失败! \n"; return false; } createByStdin(2, *(p->stu_next)); return true; } student *Student::createByStdin(int model,student &tmp) { if (model != 1) { cout << "学 号: "; cin >> tmp.stu_id; } if (model != 2) { cout << "姓 名: "; cin >> tmp.stu_name; } cout << "年龄："; cin >> tmp.stu_age; cout << "性 别: "; cin >> tmp.stu_sex; cout << "籍贯: "; cin >> tmp.stu_birth; cout << "系别："; cin >> tmp.stu_department; cout << "专业："; cin >> tmp.stu_major; cout << "班级："; cin >> tmp.stu_class; cout << "手 机: "; cin >> tmp.stu_tel; cout << "电子邮箱: "; cin >> tmp.stu_email; return &tmp; } //文件操作函数 void Student::saveToFile() { string new_file; cout << "请输入欲保存的文件名: "; cin >> new_file; fstream file; file.open(new_file.c_str(), ios::out); if (file.bad()) { cout << "文件打开失败. " << endl; return; } int len = headCount(); file << len << endl; student *pHead = head->stu_next; while (pHead != NULL) { file << pHead->stu_id << endl; file << pHead->stu_name << endl; file << pHead->stu_sex << endl; file << pHead->stu_age << endl; file << pHead->stu_birth << endl; file << pHead->stu_department << endl; file << pHead->stu_major << endl; file << pHead->stu_class << endl; file << pHead->stu_email << endl; file << pHead->stu_tel << endl; pHead = pHead->stu_next; } file.close(); cout << "保存成功. " << endl; filename = new_file; return; } void Student::readFile() { string new_file; cout << "请输入欲读取的文件名: "; cin >> new_file; fstream file; file.open(new_file.c_str(), ios::in); if (file.bad()) { cout << "文件打开失败. " << endl; return; } int len = 0; file >> len; if (!len) { cout << "文件数据异常. " << endl; return; } student pHead; file.get(); while (len--) { file >> pHead.stu_id; file >> pHead.stu_name; file >> pHead.stu_sex; file >> pHead.stu_age; file >> pHead.stu_birth; file >> pHead.stu_department; file >> pHead.stu_major; file >> pHead.stu_class; file >> pHead.stu_email; file >> pHead.stu_tel; insert(pHead); } file.close(); cout << "文件读入成功. " << endl; filename = new_file; return; } bool Student::insert(const student &astu) { student *newnode, *p = head; if (p->stu_next == NULL) //当没有下一个堆，则新建一个堆来储存修改数据 { p->stu_next = new student(astu); //用传入的已修改结构初始化 p->stu_next->stu_next = NULL; //NULL处理再下一个堆 return true; } while (p->stu_next) //当存在下一个堆 { if (p->stu_next->stu_id == astu.stu_id) //判重 { cout << "重复的学号, 插入失败! \n"; return false; } if (p->stu_next->stu_id > astu.stu_id) //如果下一个堆的id大于传入id { newnode = new student(astu); //newnode指向初始修改结构 newnode->stu_next = p->stu_next; p->stu_next = newnode; // 移位 return true; } p = p->stu_next; //既不大于也不重复就后移添加 } p->stu_next = new student(astu); p->stu_next->stu_next = NULL; return true; } //显示函数 void Student::Show() const { student *p; cout << "----------------------------------------------------------\n";