QT实现学生信息管理，修改学生信息，C++实现

下面是一个简单的学生信息管理系统，你可以在QT中使用C++代码进行实现。

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

using namespace std;

struct Student {
    string name;
    int age;
    float gpa;
};

vector<Student> students;

void addStudent() {
    Student student;
    cout << "Enter name: ";
    cin >> student.name;
    cout << "Enter age: ";
    cin >> student.age;
    cout << "Enter GPA: ";
    cin >> student.gpa;
    students.push_back(student);
    cout << "Student added!" << endl;
}

void displayStudents() {
    if (students.empty()) {
        cout << "No students to display" << endl;
        return;
    }

    for (int i = 0; i < students.size(); i++) {
        cout << "Name: " << students[i].name << endl;
        cout << "Age: " << students[i].age << endl;
        cout << "GPA: " << students[i].gpa << endl;
        cout << "---------------------" << endl;
    }
}

void updateStudent() {
    if (students.empty()) {
        cout << "No students to update" << endl;
        return;
    }

    cout << "Enter student name to update: ";
    string name;
    cin >> name;

    for (int i = 0; i < students.size(); i++) {
        if (students[i].name == name) {
            cout << "Enter new name: ";
            cin >> students[i].name;
            cout << "Enter new age: ";
            cin >> students[i].age;
            cout << "Enter new GPA: ";
            cin >> students[i].gpa;
            cout << "Student updated!" << endl;
            return;
        }
    }

    cout << "Student not found" << endl;
}

int main() {
    int choice;

    do {
        cout << "1. Add student" << endl;
        cout << "2. Display students" << endl;
        cout << "3. Update student" << endl;
        cout << "4. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;

        switch (choice) {
            case 1:
                addStudent();
                break;
            case 2:
                displayStudents();
                break;
            case 3:
                updateStudent();
                break;
            case 4:
                cout << "Goodbye!" << endl;
                break;
            default:
                cout << "Invalid choice" << endl;
        }
    } while (choice != 4);

    return 0;
}

这是一个基本的控制台应用程序，它可以添加、显示和更新学生信息。你可以将其用作基础，使用QT中的UI组件以更友好和易于使用的方式实现相同的功能。