Listing 1. Beginning of the program named PutPixel02.

#include <allegro.h> int main(){ allegro_init();//Allegro initialization install_keyboard();//Set up for keyboard input //Need to set the color depth before setting the // graphics mode. set_color_depth(32); //Set the graphics mode to a 256x256-pixel window. set_gfx_mode(GFX_AUTODETECT_WINDOWED,256,256,0,0);