linux gui图形库

#include <gtk/gtk.h>

static void activate(GtkApplication *app, gpointer user_data) {
    GtkWidget *window;

    window = gtk_application_window_new(app);
    gtk_window_set_title(GTK_WINDOW(window), "Hello GTK+");
    gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);

    GtkWidget *label = gtk_label_new("Hello, World!");
    gtk_container_add(GTK_CONTAINER(window), label);

    gtk_widget_show_all(window);
}

int main(int argc, char **argv) {
    GtkApplication *app;
    int status;

    app = gtk_application_new("org.gtk.example", G_APPLICATION_FLAGS_NONE);
    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
    status = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);

    return status;
}

#include <QApplication>
#include <QWidget>
#include <QPushButton>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    QWidget window;
    window.resize(250, 150);
    window.setWindowTitle("Hello Qt");

    QPushButton button("Hello, World!", &window);
    button.resize(100, 30);
    button.move(75, 60);

    QObject::connect(&button, &QPushButton::clicked, &app, &QApplication::quit);

    window.show();
    return app.exec();
}

#include <SDL2/SDL.h>

int main(int argc, char* argv[]) {
    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
        printf("SDL_Init Error: %s
", SDL_GetError());
        return 1;
    }

    SDL_Window* win = SDL_CreateWindow("Hello SDL", 100, 100, 640, 480, SDL_WINDOW_SHOWN);
    if (win == NULL) {
        printf("SDL_CreateWindow Error: %s
", SDL_GetError());
        SDL_Quit();
        return 1;
    }

    SDL_Renderer* ren = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
    if (ren == NULL) {
        SDL_DestroyWindow(win);
        printf("SDL_CreateRenderer Error: %s
", SDL_GetError());
        SDL_Quit();
        return 1;
    }

    SDL_SetRenderDrawColor(ren, 255, 0, 0, 255);
    SDL_RenderClear(ren);
    SDL_RenderPresent(ren);

    SDL_Delay(3000);

    SDL_DestroyRenderer(ren);
    SDL_DestroyWindow(win);
    SDL_Quit();

    return 0;
}