HP SunSoft Pascal 4.0 - Manual (Page 91)

67
Program Construction and
Management
4
This chapter is an introduction to the methods generally used to construct and
manage programs using Pascal. It describes units and libraries in two separate
sections:
Units
For many reasons, it is often inconvenient to store a program in a single file, as
in the case of a very large program.
You can break up a program in several ways. Perhaps the simplest way is to
use an
include file. An include file is a separate file that is copied in by the
compiler when it encounters an include compiler directive. For example, in
the following program:
the line #include "includefile" is a compiler directive to cpp (1), the
Pascal compiler’s preprocessor. The directive instructs cpp (1) to find the file
includefile and copy it into the stream before continuing.
Units page 67
Libraries page 74
program include (output);
#include "includefile"