Problem using multiple .cpp and .h files in one project

[WhiteWind]

Here's an issue that I've found incredibly irritating since it has nothing to do with coding errors, but rather what my IDE is doing.

Basically I have main.cpp, then two classes, each of which has a .h and a .cpp. At the top of each .cpp file I've added the #include "theheader.h" statements for each class.

Everything I put in the header files works (ie. inline function stuff), but any time I try to use the code in the other .cpps in main.cpp, it throws:

undefined reference to 'Class::Function()'

I know this has got to be such a dumb error, but help would be much appreciated.

[zb0S216C]

Sounds like you haven't included the files into your project.

_Wazzak

[Nexius]

You may not use inline functions across cpp files like that.
An inline function -must- be defined where it is declared. Otherwise you'll get an unresolved external error in your build.

If your compiler is not from the stone-age, you may not want to explicitly declare your function inline anyway. It should optimize your code. Declaring it inline only -hints- it to be inline, it doesn't guarantee it. (at least in the MSVC compiler)

[WhiteWind]

Thanks frame, for some reason all but one of the files were added. It explains a lot.