collision detection is not functioning in this game code.

[srikanth chitturi]

Hello,

I am a beginner in game programming in sdl.

I am following aaron cox's tutorial's at http://www.aaroncox.net/tutorials/

He has given an sdlGameEngine and using it he has explained how to deal with game basics.

Everything has worked fine but collision detection is not working.

I source code as an msvc project is at http://www.4shared.com/folder/O3DHPE8O/_online.html

The controls to move bigbug are the arrow keys and to move the smallbug are asdw .

The bugs should stop while colliding with screen and rock.

Thanks in advance.