Where to find C source code on mac? [closed]

Question

I was looking through a programming textbook and saw a particular header i didn't recognize. Later I looked it up on the internet but I was wondering where the source code of C can be found on a macbook. Is it just in the compiler? (I use gcc) Please help.

Answer 1

If you have Apple development tools installed, it should be found in the most possible unixoid place: /usr/include/ctype.h - At least that's where it is on my Macbook with Xcode installed.