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 ISACC Instruction Manual
STAND ALONE COMMANDS
:  These are one word commands that are basic to the
execution of a C program.  These commands allow you to compile, test, start and stop a C
program.
KEYWORDS
:  These are short words or symbols that define variables or execute specific
actions within a C program.  They include operators, assignment, comparators, and comments.
PREDEFINED VARIABLES
:  These are variables that have specific predefined values that
are automatically updated and cannot be changed by the user.
FUNCTIONS
:  These are word commands that perform a predefined function within a C
program.
ARRAYS
:  This is a more advanced programming type that significantly shortens and simpli-
fies long programs.
ERROR HANDLING
:  When a program is compiled, it is scanned for language related
errors.  An error message including the type of error is displayed.
This chapter provides basic instruction in the C language and gives all the commands that are
valid for use with ISACC.  Sample programs are included.  If you have questions or problems,
please call for technical support at (610)558-2700.