This is an intermediate to advanced level book designed to teach readers how to program in the C language. It provides a detailed treatment of advanced C programming for the UNIX environment, and addresses such other topics as X-windows, pointers and structures, generating programs with make and debugging C programs. Containing many actual working and practical examples in order to provide hands-on experience, the book also includes comprehensive information on the standard C Library and the standard I/O Library. It has been updated for compatibility with System V/Release 4 and with ANSI.