Your question is outside the domain of comp.lang.c, which discusses only the standard C programming language, including the standard C library. This is a remarkably narrow topic compared to what many people expect.
For your convenience, the list below contains topics that are not on-topic for comp.lang.c, and suggests newsgroups for you to explore if you have questions about these topics. Please do observe proper netiquette before posting to any of these newsgroups. In particular, you should read the group's charter and FAQ, if any (FAQs are available from www.faqs.org and other sources). If those fail to answer your question then you should browse through at least two weeks of recent articles to make sure that your question has not already been answered.
OS-specific questions, such as how to clear the screen, access the network, list the files in a directory, or read “piped” output from a subprocess. These questions should be directed to OS-specific newsgroups, such as comp.os.ms-windows.programmer.misc, comp.unix.programmer, or comp.os.linux.development.apps.
Compiler-specific questions, such as installation issues and locations of header files. Ask about these in compiler-specific newsgroups, such as gnu.gcc.help or comp.os.ms-windows.programmer.misc. Questions about writing compilers are appropriate in comp.compilers.
Processor-specific questions, such as questions about assembly and machine code. x86 questions are appropriate in comp.lang.asm.x86, embedded system processor questions may be appropriate in comp.arch.embedded.
ABI-specific questions, such as how to interface assembly code to C. These questions are both processor- and OS-specific and should typically be asked in OS-specific newsgroups.
Algorithms, except questions about C implementations of algorithms. “How do I implement algorithm X in C?” is not a question about a C implementation of an algorithm, it is a request for source code. Newsgroups comp.programming and comp.theory may be appropriate.
Making C interoperate with other languages. C has no facilities for such interoperation. These questions should be directed to system- or compiler-specific newsgroups. C++ has features for interoperating with C, so consider comp.lang.c++ for such questions.
The C standard, as opposed to standard C. Questions about the C standard are best asked in comp.std.c.
C++. Please do not post or cross-post questions about C++ to comp.lang.c. Ask C++ questions in C++ newsgroups, such as comp.lang.c++ or comp.lang.c++.moderated.
Test posts. Please test in a newsgroup meant for testing, such as alt.test.
news.groups.questions is a good place to ask about the appropriate newsgroup for a given topic.