The unbundled Sun C compiler is now ANSI C compliant. Most ANSI C changes are beyond the scope of this book. A number of ANSI C books are available in local bookstores; in particular, the following books are good references:
Kernighan and Ritchie, The C Language, 2nd Ed., Prentice-Hall, 1988.
Harbison and Steele, C: A Reference Manual, 2nd Ed., Prentice-Hall, 1987.