#include <allegro.h>

 
volatile long speed_counter = 0;

void increment_speed_counter() // A function to increment the speed counter
{
	speed_counter++; 
}
END_OF_FUNCTION(increment_speed_counter); 

int main()
{
	allegro_init();
	install_keyboard();
	install_timer();
	
	 
	LOCK_VARIABLE(speed_counter); //Used to set the timer - which regulates the game's
	LOCK_FUNCTION(increment_speed_counter);//speed.
	
	install_int_ex(increment_speed_counter, BPS_TO_TIMER(60));
	
	set_color_depth(32);	
	set_gfx_mode(GFX_AUTODETECT_WINDOWED , 800 , 600 , 0 , 0);
	
	
	BITMAP *tank = NULL;
	BITMAP *buffer = NULL;
	
	buffer = create_bitmap(800,600);
	tank = load_bitmap("tank2.bmp",NULL); 
	
	int tank_X = 0;
	int tank_Y = 0;
	
	
	while(!key[KEY_ESC])//If the user hits escape, quit the program 
	{
		while(speed_counter > 0)
		{
		
			if(key[KEY_RIGHT]) 
			{ 
				tank_X++; 
			} 
			
			else if(key[KEY_LEFT]) 
			{ 
				tank_X--; 
			}
			
			else if(key[KEY_UP])
			{
				tank_Y--; 
			} 
			
			else if(key[KEY_DOWN])
			{ 
				tank_Y++; 
			}
			
			speed_counter--;
		} // speed counter loop
		
		
		draw_sprite(buffer, tank, tank_X, tank_Y);
		blit(buffer, screen, 0,0,0,0,800,600);  
		clear_bitmap(buffer); 

	}
		
		
	destroy_bitmap(tank);
	destroy_bitmap(buffer);
	
	return 0;
	
}
END_OF_MAIN()