Sure. Use the FILE functions (fopen(), fgets() etc.)
It's time to buy a C-book. There are good references in the FAQ.
Note : Please don't ask anything here about C++. C++ *is not* C at all. Try
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The C-language FAQ: http://www.yqcomputer.com/
FAQ de f.c.l.c : http://www.yqcomputer.com/