Allegro5 Display Init Test

#include <stdio.h>
#include <allegro5\allegro.h>

int main () {
    ALLEGRO_DISPLAY *display = NULL;

    //Initialize Allegro library
    if (!al_init()) {
        fprintf(stderr, "Failed to initialize Allegro.\n");
        return(-1);
    }

    //Create screen 640x480
    display = al_create_display(640, 480);
    if (!display) {
        fprintf(stderr, "Failed to create display.\n");
        return(-1);
    }

    al_clear_to_color(al_map_rgb(0,0,0)); //Clear display to white
    al_flip_display();                    //Use back image buffer
    al_rest(10.0);                        //Wait 10sec
    al_destroy_display(display);          //End display and free memory

    return(0);
}