14 Variable Scope and Structuring Code

		Chapter 15 Passing Values between Functions

		C passes variables between functions using two different methods. The one you use depends on how you want the passed variables to be changed. This chapter explores these two methods. The concepts discussed here are not new to the C language. Other programming languages, such as Pascal, FORTRAN, and QBasic, pass parameters using similar techniques. A computer language must have the capability to pass information between functions, before it can be called truly structured.

		This chapter teaches you the following topics:

		Passing variables by value

		Passing arrays by address

		Passing nonarrays by address