Campbell CR6 Series, Operator'S Manual

Page: 184 / 690

Section 7. Installation
184
These four elements must be properly placed within the program structure.
7.6.2.2.1 Inserting Comments into Program
Comments are non-executable text placed within the body of a program to
document or clarify program algorithms.
As shown in CRBasic example Inserting Comments
(p. 184),
comments are inserted
into a program by preceding the comment with a single quote ( ' ). Comments can
be entered either as independent lines or following CR6 code. When the CR6
compiler sees a single quote ( ' ), it ignores the rest of the line.
Inserting Comments
'This program example demonstrates the insertion of comments into a program. Comments are
'placed in two places: to occupy single lines, such as this explanation does, or to be
'placed after a statement.
'Declaration of variables starts here.
Public Start(6) 'Declare the start time array
BeginProg
EndProg
7.6.2.2.2 Conserving Program Memory
One or more of the following memory-saving techniques can be used on the rare
occasions when a program reaches memory limits:
•
Declare variables as DIM instead of Public . DIM variables do not
require buffer memory for data retrieval.
•
Reduce arrays to the minimum size needed. Arrays save memory over
the use of scalars as there is less "meta-data" required per value.
However, as a rough approximation, 19200 (4 kB memory) variables will
fill available memory.
•
Use variable arrays with aliases instead of individual variables with
unique names. Aliases consume less memory than unique variable
names.
•
Confine string concatenation to DIM variables.
•
Dimension string variables only to the size required.
Read More More information on string variable-memory use and
conservation is available in
String Operations
(p. 379).