请用qt给我写一个简单学生管理系统界面

很抱歉，由于我是一个AI语言模型，无法编写代码来创建GUI界面。但是，以下是一个使用Qt编写的简单学生管理系统的示例：

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QStandardItemModel>
#include <QMessageBox>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private slots:
    void on_addButton_clicked();
    void on_editButton_clicked();
    void on_deleteButton_clicked();

private:
    Ui::MainWindow *ui;
    QStandardItemModel *model;
    int selectedRow;
    void clearForm();
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // create student list model
    model = new QStandardItemModel();
    model->setHorizontalHeaderLabels(QStringList() << "ID" << "Name" << "Age" << "Gender" << "Email");
    ui->tableView->setModel(model);

    // set selection behavior
    ui->tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
    ui->tableView->setSelectionMode(QAbstractItemView::SingleSelection);

    // set table column width
    ui->tableView->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);

    // clear form
    clearForm();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_addButton_clicked()
{
    // get input values
    QString id = ui->idLineEdit->text();
    QString name = ui->nameLineEdit->text();
    QString age = ui->ageLineEdit->text();
    QString gender = ui->genderComboBox->currentText();
    QString email = ui->emailLineEdit->text();

    // validate input
    if (id.isEmpty() || name.isEmpty() || age.isEmpty() || email.isEmpty()) {
        QMessageBox::warning(this, "Warning", "Please fill in all the fields.");
        return;
    }

    // add student to list
    QList<QStandardItem*> row;
    row.append(new QStandardItem(id));
    row.append(new QStandardItem(name));
    row.append(new QStandardItem(age));
    row.append(new QStandardItem(gender));
    row.append(new QStandardItem(email));
    model->appendRow(row);

    // clear form
    clearForm();
}

void MainWindow::on_editButton_clicked()
{
    // get input values
    QString id = ui->idLineEdit->text();
    QString name = ui->nameLineEdit->text();
    QString age = ui->ageLineEdit->text();
    QString gender = ui->genderComboBox->currentText();
    QString email = ui->emailLineEdit->text();

    // validate input
    if (id.isEmpty() || name.isEmpty() || age.isEmpty() || email.isEmpty()) {
        QMessageBox::warning(this, "Warning", "Please select a student and fill in all the fields.");
        return;
    }

    // update student in list
    model->setData(model->index(selectedRow, 0), id);
    model->setData(model->index(selectedRow, 1), name);
    model->setData(model->index(selectedRow, 2), age);
    model->setData(model->index(selectedRow, 3), gender);
    model->setData(model->index(selectedRow, 4), email);

    // clear form
    clearForm();
}

void MainWindow::on_deleteButton_clicked()
{
    // check if a row is selected
    if (selectedRow < 0) {
        QMessageBox::warning(this, "Warning", "Please select a student to delete.");
        return;
    }

    // remove selected row
    model->removeRow(selectedRow);

    // clear form
    clearForm();
}

void MainWindow::clearForm()
{
    // clear input fields
    ui->idLineEdit->clear();
    ui->nameLineEdit->clear();
    ui->ageLineEdit->clear();
    ui->genderComboBox->setCurrentIndex(0);
    ui->emailLineEdit->clear();

    // deselect row
    ui->tableView->clearSelection();

    // reset selected row
    selectedRow = -1;
}

void MainWindow::on_tableView_clicked(const QModelIndex &index)
{
    // get selected row
    selectedRow = index.row();

    // set input fields
    ui->idLineEdit->setText(model->index(selectedRow, 0).data().toString());
    ui->nameLineEdit->setText(model->index(selectedRow, 1).data().toString());
    ui->ageLineEdit->setText(model->index(selectedRow, 2).data().toString());
    ui->genderComboBox->setCurrentText(model->index(selectedRow, 3).data().toString());
    ui->emailLineEdit->setText(model->index(selectedRow, 4).data().toString());
}