如何使用c++更改小部件中的文本

#include <iostream>
#include <gtk/gtk.h>

GtkWidget* window;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "Change Text Example");
gtk_container_set_border_width(GTK_CONTAINER(window), 10);
gtk_widget_set_size_request(window, 200, 100);

GtkWidget* label;
GtkWidget* button;
label = gtk_label_new("Initial Text");
button = gtk_button_new_with_label("Change Text");

void change_text(GtkWidget* widget, gpointer data)
{
    gtk_label_set_text(GTK_LABEL(data), "Text Changed");
}

g_signal_connect(button, "clicked", G_CALLBACK(change_text), label);

GtkWidget* vbox;
vbox = gtk_vbox_new(FALSE, 5);
gtk_box_pack_start(GTK_BOX(vbox), label, TRUE, TRUE, 0);
gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);

gtk_container_add(GTK_CONTAINER(window), vbox);
gtk_widget_show_all(window);
gtk_main();