Thread: .cpp linking problems

each time when i define a header file in my main cpp and then use the classes i define in the header file in some different cpp file it gives me "undefine" error

Originally Posted by matsp

Are you compiling on the command line or in an IDE?

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Mats

command line in Microsoft compiler

Originally Posted by matsp

Then I will guess that you are doing something like this:

Code:

cl -o myprog main.cpp

where you should do:

Code:

cl -o myprog main.cpp class.cpp

(Alternatives do exist).

Edit: What I'm trying to say is that you need to tell the compiler which CPP files it should compile (and link). Just because you include a header file doesn't automatically mean that the source file with the implementation will be compiled/linked against.

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Mats

thanks for telling