Header file throwing errors in one project, but not in another

Question

I'm trying to integrate two projects, and to that end am including header files from one into the other. I'm using visual studio 2008 express.

The line

int E4407B_PPM(int &);

is throwing errors in the new project, but the original project compiles just fine.

The error I'm getting:

error C2143: syntax error : missing ')' before '&'

Any ideas?

Edit: I ended up removing the lines that took parameters in by reference, and just insured that all functions were declared before they were used in the actual source file. I guess it was a C++/C thing.

Answer 1

You are probably building the second project (or at least the source file) as straight C. Make sure the file has a .cpp extension or that you are forcing a C++ compile (you can use the /TP compile option to do that).

Edit You can specify it for a single file: Right click on the file in the solution explorer and select Properties. Click on the Advanced option under C/C++. Choose "Compile as C++ Code (/TP)" (second option in the page in my version of Visual Studio).

Answer 2

If this is a forward declaration for the function in another project try using extern.