💕💕💕大家好，这是作业侠系列之C++实现学生管理系统，还是那句话，大家不想cv或者cv了跑不起来,三连后都可以来找我要源码，私信或评论留下你的邮箱即可。有任何问题有可以私聊我，大家觉得还行的话，期待你们的三连，这也是我创作的最大动力💕💕💕
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学生管理系统功能概览，具体操作大家可以自己运行试试：
代码概览：
OperationManagement.h 将学生，成绩等信息等从文件中读取出来以及其他操作，放入容器中，便于操作，不用一直对文件进行I/O.
Score.h 用于对成绩抽象，并实现了>>的重载，便于文件读入，读出
Student.h 对学生进行的抽象，同样实现了>>的重载，便于文件读入，读出
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全部代码与讲解:
1.sms.cpp
#include <iostream>
#include "OperationManagement.h"
int main()
{
OperationManagement om;
om.init();
while (true)
{
om.showMenu();
cout << "请输入您要使用的功能序号：" << endl;
int choice;
cin >> choice;
switch (choice)
{
case 0: //添加功能
om.addStudent();
break;
case 1: //删除功能
om.deleteStudent();
break;
case 2: //更新功能
om.updateStudent();
break;
case 3:
om.addScore();
break;
case 4:
om.deleteScore();
break;
case 5:
om.updateScore();
break;
case 6:
om.displayStudentInfo();
break;
default:
system("cls"); //cls的作用是清空屏幕的功能，使用户可以再次输入选项数字
break;
}
}
system("pause"); //使程序有一个暂停阻碍的功能，防止界面突然退出
return 0;
}
score.cpp
#include "Score.h"
Score::Score()
{
}
Score::Score(string id, string course, int score)
: studentId(id), courseName(course), scoreValue(score) {}
string Score::getStudentId() { return studentId; }
string Score::getCourseName() { return courseName; }
int Score::getScoreValue() { return scoreValue; }
void Score::setStudentId(string id) {
studentId = id;
}
void Score::setCourseName(string course) {
courseName = course;
}
void Score::setScoreValue(int score) {
scoreValue = score;
}
istream& operator>>(istream& input, Score* s) {
input >> s->studentId >> s->courseName >> s->scoreValue ;
return input;
}
ostream& operator<<(ostream& output, const Score* s) {
output << s->studentId << " " << s->courseName << " " << s->scoreValue << endl;
return output;
}
void Score::display() {
cout << "学生ID: " << studentId << " "<<"课程名称: " << courseName << " "<<"分值: " << scoreValue << endl;
}
student.cpp
#include "Student.h"
Student::Student()
{
}
Student::Student(string id,string n, string dorm,string phone)
: studentId(id), name(n), dormitory(dorm), phoneNumber(phone) {}
string Student::getStudentId() { return studentId; }
string Student::getName() { return name; }
string Student::getDormitory() { return dormitory; }
string Student::getPhoneNumber() { return phoneNumber; }
void Student::setStudentId(string id) {
studentId = id;
}
void Student::setName(string n) {
name = n;
}
void Student::setDormitory(string dorm) {
dormitory = dorm;
}
void Student::setPhoneNumber(string phone) {
phoneNumber = phone;
}
istream& operator>>(istream& input, Student* s) {
input >> s->studentId >> s->name >> s->dormitory >> s->phoneNumber ;
return input;
}
ostream& operator<<(ostream& output, const Student* s) {
output << s->studentId << " " << s->name << " " << s->dormitory << " " << s->phoneNumber ;
return output;
}
OperationManagement.cpp
#include "OperationManagement.h"
#include<fstream>
#include<iostream>
using namespace std;
void OperationManagement::init()
{
ifstream readFile;
readFile.open("students.txt");
if (!readFile.is_open())
{
cout << "学生数据读取错误" << endl;
readFile.close();
return;
}
while (!readFile.eof())
{
Student* student = new Student();
readFile >>student;
string id = student->getStudentId();
students[id] = student;
}
readFile.close();
readFile.open("scores.txt");
if (!readFile.is_open())
{
cout << "成绩数据读取错误" << endl;
readFile.close();
return;
}
while (!readFile.eof())
{
Score* score = new Score();
readFile >> score;
string id = score->getStudentId();
scores.insert(make_pair(id, score));
}
readFile.close();
}
void OperationManagement::displayStudentInfo() {
string studentId;
cout << "请输入您要查询的学生学号" << endl;
cin >> studentId;
for (auto map : students) {
if (map.first == studentId) {
Student* student = map.second;
cout << "学号: "<< studentId <<"学生信息如下：" << endl;
cout << "姓名: " << student->getName() << " " << "宿舍: " << student->getDormitory() << " " << "电话: " << student->getPhoneNumber() << endl;
// 查询学生成绩
cout << "该生成绩情况如下：" << endl;
if (scores.size() == 0) {
cout << "暂无成绩" << endl;
}
else {
for (auto smap : scores) {
if (smap.first == studentId) {
Score* score = new Score();
score = smap.second;
cout << "课程名: " << score->getCourseName() << " 分值: " << score->getScoreValue() << endl;
}
}
}
return;
}
}
cout << "未找到该学生信息！" << endl;
}
void OperationManagement::showMenu()
{
cout << "------------O.o 欢迎您使用学生管理系统 o.O------------" << endl;
cout << "------------O.o 可用的功能编号如下 ： o.O------------" << endl;
cout << "------------O.o 0，添加学生信息功能 o.O------------" << endl;
cout << "------------O.o 1，查找学生信息功能 o.O------------" << endl;
cout << "------------O.o 2，修改学生信息功能 o.O------------" << endl;
cout << "------------O.o 3，添加学生成绩功能 o.O------------" << endl;
cout << "------------O.o 4，删除学生成绩功能 o.O------------" << endl;
cout << "------------O.o 5，修改学生成绩功能 o.O------------" << endl;
cout << "------------O.o 6，查询学生信息 o.O------------" << endl;
}
void OperationManagement::addStudent() {
cout << "请输入您要添加的学生的学号:" << endl;
string id;
cin >> id;
// 检查学生是否已存在
if (students.count(id) > 0) {
cout << "该学号已存在，添加失败" << endl;
}
else {
string name;
string dormitory;
string phoneNumber;
cout << "请输入您要添加的学生的姓名:" << endl;
cin >> name;
cout << "请输入您要添加的学生的所在宿舍:" << endl;
cin >> dormitory;
cout << "请输入您要添加的学生的电话:" << endl;
cin >> phoneNumber;
Student* student = new Student(id, name, dormitory, phoneNumber);
students[id] = student;
ofstream writeFile("students.txt", ios::app);
writeFile << endl << student;
cout << "学生信息添加成功！" << endl;
}
}
void OperationManagement::deleteStudent() {
cout << "请输入您要删除的学生的学号:" << endl;
string id;
cin >> id;
// 检查学生是否已存在
if (students.count(id) == 0) {
cout << "该学号不存在，删除失败" << endl;
}
else {
auto it = students.find(id);
// 如果找到了对应的学生，则从unordered_map中删除该学生
if (it != students.end()) {
delete it->second; // 删除指针指向的内存
students.erase(it); // 从unordered_map中删除该学生
ofstream writeFile("students.txt", ios::out);
for (auto student : students)
{
writeFile << endl << student.second;
}
cout << "删除成功" << endl;
}
else {
cout << "删除失败，未知错误" << endl;
}
}
}
void OperationManagement::updateStudent() {
cout << "请输入您要修改的学生的学号:" << endl;
string id;
cin >> id;
// 检查学生是否已存在
if (students.count(id) == 0) {
cout << "该学号不存在，修改失败" << endl;
}
else {
auto it = students.find(id);
string cmd, name;
string dormitory;
string phoneNumber;
if (it != students.end()) {
while (1)
{
cout << "请输入您要修改的相应信息,输入对应序号即可:" << endl;
cout << "1.修改学生姓名" << endl;
cout << "2.修改学生宿舍" << endl;
cout << "3.修改学生电话" << endl;
cout << "若您确认修改，请输入:y" << endl;
cin >> cmd;
if (cmd == "1")
{
cout << "请输入您要修改为的学生姓名:" << endl;
cin >> name;
it->second->setName(name);
}
else if (cmd == "2")
{
cout << "请输入您要修改为的宿舍:" << endl;
cin >> dormitory;
it->second->setDormitory(dormitory);
}
else if (cmd == "3")
{
cout << "请输入您要修改为的电话:" << endl;
cin >> phoneNumber;
it->second->setPhoneNumber(phoneNumber);
}
else if (cmd == "y")
{
ofstream writeFile("students.txt", ios::out);
for (auto student : students)
{
writeFile << endl << student.second;
}
writeFile.close();
cout << "修改成功" << endl;
break;
}
}
}
}
}
void OperationManagement::addScore() {
cout << "请输入您要添加成绩的学生的学号:" << endl;
string id;
cin >> id;
// 检查学生是否已存在
if (students.count(id) == 0) {
cout << "该学号不存在，添加失败" << endl;
}
else {
string courseName;
int scoreValue;
cout << "请输入您要添加的课程名称:" << endl;
cin >> courseName;
bool flag = false;
for (auto score : scores)
{
if (score.second->getCourseName() == courseName)
{
flag = true;
break;
}
}
if (flag)
{
cout << "该学生本课程已有分数若要修改，请使用修改成绩功能" << endl;
}
cout << "请输入您要添加的课程分值:" << endl;
cin >> scoreValue;
Score* score = new Score(id, courseName,scoreValue);
scores.insert(make_pair(id, score));
ofstream writeFile("scores.txt", ios::app);
writeFile << endl << score;
cout << "学生成绩添加成功！" << endl;
}
}
void OperationManagement::deleteScore() {
cout << "请输入您要删除成绩的学生的学号:" << endl;
string id;
cin >> id;
// 检查学生是否已存在
if (scores.count(id) == 0) {
cout << "该学号学生暂无课程成绩，删除失败" << endl;
}
else {
cout << "找到该学生课程成绩情况如下" << endl;
for (auto score : scores)
{
if (score.second->getStudentId() == id)
{
score.second->display();
}
}
cout << "请输入您要删除的该学生课程成绩名称" << endl;
string delName;
cin >> delName;
bool flag = false;
for (auto it = scores.begin(); it != scores.end(); ) {
// 获取当前元素的键和值
string studentId = it->first;
Score* score = it->second;
// 如果需要删除该元素，则进行删除操作
if (studentId == id && score->getCourseName() == delName) {
delete score; // 释放Score对象占用的内存
it = scores.erase(it); // 从unordered_map中删除该元素
flag = true;
break;
}
else {
++it; // 移动到下一个元素
}
}
if (flag)
{
ofstream writeFile("scores.txt", ios::out);
for (auto score : scores)
{
writeFile << endl << score.second;
}
cout << "删除成功" << endl;
}
else {
cout << "删除失败，该学生没有此课程名称的成绩" << endl;
}
}
}
void OperationManagement::updateScore() {
cout << "请输入您要修改成绩的学生的学号:" << endl;
string id;
cin >> id;
// 检查学生是否已存在
if (scores.count(id) == 0) {
cout << "该学号学生暂无课程成绩，修改失败" << endl;
}
else {
cout << "找到该学生课程成绩情况如下" << endl;
for (auto score : scores)
{
if (score.second->getStudentId() == id)
{
score.second->display();
}
}
cout << "请输入您要修改的该学生课程成绩名称" << endl;
string upName;
cin >> upName;
bool flag = false;
for (auto it = scores.begin(); it != scores.end(); ) {
// 获取当前元素的键和值
string studentId = it->first;
Score* score = it->second;
// 如果需要删除该元素，则进行修改操作
if (studentId == id && score->getCourseName() == upName) {
cout << "请输入您要修改为的分值:" << endl;
int newS;
cin >> newS;
score->setScoreValue(newS);
flag = true;
break;
}
else {
++it; // 移动到下一个元素
}
}
if (flag)
{
ofstream writeFile("scores.txt", ios::out);
for (auto score : scores)
{
writeFile << endl << score.second;
}
cout << "修改成功" << endl;
}
else {
cout << "修改失败，该学生没有此课程名称的成绩" << endl;
}
}
}
