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Class Template - Linker Error

s_lavie
s_lavie asked
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Last Modified: 2011-10-03
Hi,
I wrote a code in c++, using a template class.
When I put all function and declaration in one file (no project) it was just fine. But when I divided it to few files (using project) I had a linker error:
"undefined symbol a<int>::show_num() in module appl.cpp"
when "a" is the class template, and "show_num()" is a public function in it.
the same goes very well when I don't use the template.

Any idea ????????

please if can add an example.
Thank you.
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Commented:
>> You can't split the functions of a template class to a cpp file
You can, but only if it will be used in only that .cpp file.   If a template is used by multiple .cpp files, but the entire template in a .h file.  If the template is useed on only one .cpp file, you can place it in the .cpp file  (In that case, I would put everything for the template in the ,cpp file, you wouldn't want a .h for that.)

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