Sams Teach Yourself C in 21 Days, Fifth Edition presents C programming techniques in a logical and easy-to-follow sequence that helps you understand the principles involved in developing C programs. Learn the basics of writing a program, then move on to arrays, pointers, disk input/output, functions, and more. This book covers the basics of C including variables, constants, conditional statements, loops, pointers, data structures, input/output, and functions. Sams Teach Yourself C in 21 Days, Fifth Edition, presents C in the most logical and easy-to-learn sequence, and is geared towards programmers learning the C language.