Bunch of compilation errors in cmath when building C code in Visual Studio 2010

I'm trying to compile C code in VS2010. When I do, I get 714 errors in cmath, a file I haven't even included.

Here are the included files: http://pastebin.com/LzsDfEcr

The errors are all the same "style", e开发者_如何学Python.g:

Error   711 error C2061: syntax error : identifier 'ceil'   c:\program files (x86)\microsoft visual studio 10.0\vc\include\cmath    40
Error   712 error C2059: syntax error : ';' c:\program files (x86)\microsoft visual studio 10.0\vc\include\cmath    40

and then the same two errors just with another identifier.

I have Compile As C on under C/C++ -> Advanced, and all the files in the project are .c files.

<cmath> is a C++ header file. It's probably being included by some other C++ header file. Looking at your code, I can see that you're including <string> and <sstream>, both of which are C++ header files.

//#include <unistd.h> // doesn't exist in vs2010?

unistd.h is a unix header