Did you actually copy and paste all of this: because I''m guessing you didn''t.

This is what you claim to have written:

call fn:   loadmap("map0.mrpg"); 

But this is the error that looks like it was copied from MSVC:

error:   c:\my programs\other\game.cpp(189) : error C2065: ''laodmap'' : undeclared identifier 

Notice the misspelling of ''loadmap'' as ''laodmap''. I bet you typed laodmap in game.cpp. Check it.