学生管理系统c++编程

以下是一个简单的学生信息管理系统的C++代码示例，可以实现学生信息的插入、修改、删除和查询功能：

#include <iostream>
#include <string>
#include <vector>

using namespace std;

// 定义学生类
class Student {
public:
    string name;
    int age;
    string gender;
    string id;
    string major;
    double gpa;

    // 构造函数
    Student(string n, int a, string g, string i, string m, double gpa) {
        name = n;
        age = a;
        gender = g;
        id = i;
        major = m;
        this->gpa = gpa;
    }

    // 显示学生信息
    void display() {
        cout << "Name: " << name << endl;
        cout << "Age: " << age << endl;
        cout << "Gender: " << gender << endl;
        cout << "ID: " << id << endl;
        cout << "Major: " << major << endl;
        cout << "GPA: " << gpa << endl;
    }
};

// 定义学生信息管理类
class StudentManager {
private:
    vector<Student> students;

public:
    // 添加学生信息
    void addStudent(Student s) {
        students.push_back(s);
    }

    // 修改学生信息
    void modifyStudent(string id, Student s) {
        for (int i = 0; i < students.size(); i++) {
            if (students[i].id == id) {
                students[i] = s;
                break;
            }
        }
    }

    // 删除学生信息
    void deleteStudent(string id) {
        for (int i = 0; i < students.size(); i++) {
            if (students[i].id == id) {
                students.erase(students.begin() + i);
                break;
            }
        }
    }

    // 查询学生信息
    void queryStudent(string id) {
        for (int i = 0; i < students.size(); i++) {
            if (students[i].id == id) {
                students[i].display();
                break;
            }
        }
    }

    // 显示所有学生信息
    void displayAll() {
        for (int i = 0; i < students.size(); i++) {
            students[i].display();
            cout << endl;
        }
    }
};

int main() {
    StudentManager sm;

    // 添加学生信息
    Student s1("Tom", 18, "Male", "001", "Computer Science", 3.8);
    sm.addStudent(s1);
    Student s2("Lucy", 19, "Female", "002", "Mathematics", 3.9);
    sm.addStudent(s2);

    // 显示所有学生信息
    sm.displayAll();

    // 修改学生信息
    Student s3("Jerry", 20, "Male", "001", "Computer Science", 3.7);
    sm.modifyStudent("001", s3);
    sm.displayAll();

    // 删除学生信息
    sm.deleteStudent("002");
    sm.displayAll();

    // 查询学生信息
    sm.queryStudent("001");

    return 0;
}