Runtime error

Kode 

#include <allegro.h>
#include "spriteLib.h"

void init();
void deinit();

int main() {
	init();
	
	SpriteLib spriteLib;

	while (!key[KEY_ESC]) {
		blit(spriteLib.getSprite("lol.bmp"), screen, 0,0,0,0,100,100);
	}

	deinit();
	return 0;
}
END_OF_MAIN()

void init() {
	int depth, res;
	allegro_init();
	depth = desktop_color_depth();
	if (depth == 0) depth = 32;
	set_color_depth(depth);
	res = set_gfx_mode(GFX_AUTODETECT_WINDOWED, 640, 480, 0, 0);
	if (res != 0) {
		allegro_message(allegro_error);
		exit(-1);
	}

	install_timer();
	install_keyboard();
	install_mouse();
	/* add other initializations here */
}

void deinit() {
	clear_keybuf();
	
	allegro_exit();
}

Kode 

//spriteLib.h

#ifndef SPRITE_LIB_H
#define SPRITE_LIB_H

#include <allegro.h>
#include <map>
#include <string>

using namespace std;

class SpriteLib
{
    private:
        map<const char*,BITMAP*> sprites;
    public:
        BITMAP* getSprite(const char*);
};

#endif

Kode 

//spriteLib.cpp

#include "spriteLib.h"

BITMAP * SpriteLib::getSprite(const char* path)
{
    if(sprites[path] == NULL)
    {
        sprites[path] == load_bitmap(path, NULL);
    }
    return sprites[path];
}