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Hi

I have a program in which my video routines are in a secndary module video.c, its prototypes are in video.h. My main function is in a module called main.c. My Main function at the moment calls just one of the video routines and it compiles fine but I get a linker error:

?Linker Error: Undefined symbol _Print_Char in module MAIN.C

I include the header file just fine and it compiles so what is going wrong?

Thanks

Are you actually linking both object files after compiling them? The header file just lets the compiler know the functions are available; it doesn't include them into the output. You need to specify the names of both object files on the linker command line.

did you give both video.o and main.o files to the linker ?
the trick is to compile your file separately ( *.c -> *.o) and then to give all .o files to the linker in order to produce a single .bin file

Pype.Clicker wrote: did you give both video.o and main.o files to the linker ?
the trick is to compile your file separately ( *.c -> *.o) and then to give all .o files to the linker in order to produce a single .bin file

I just went run in the run menu of the IDE

I just went run in the run menu of the IDE

hmm Interesting, it worked fine from the command line, is the IDE crap?? Shame if it is , as the Turbo Pascal one was great (for Pascal of course )

you cannot just run if you have a multi-module project: you must build it first.... unlike pascal, C isn't interpretable...

Pype.Clicker means to say that, unlike Pascal, C doesn't take care of linking and dependencies for you. You have to compile each source file separately and link them into one executable; to do you, you probably need to create a project and add all your source files there.

hum, yes... tnx for the translation, Tim ... that was one-hand-only typed in a hurry