Question about compiling C source on C++

I downloaded the command line Borland C++ compiler (which has now been released for FREE!) but I can't figure out how to use it to compile original *.C (C source code) files. When I run BCC32.EXE (Borland C Compiller 32bit) that is the main exe file in the package, it seems to generate errors when it tries to compile anything other than *.CPP (C++ source code) files. How do I make it compile C source code? It seems to want only C++ source code. Please help. Thanks in advance.

Moved From The CodeBank (which is for sharing code rather than asking questions :)