多背景循环map\Background.cpp .............\Background.h .............\Bitmap.cpp .............\Bitmap.h .............\GameMain.cpp .............\Res\bg0.bmp .............\...\bg1.bmp .............\...\bg2.bmp .............\...\player.bmp .............\ScrollingBackground.cpp .............\ScrollingBackground.h .............\Sprite.cpp .............\Sprite.h .............\Res 多背景循环map