Remote-processing RPC-2350 Manuel d'utilisateur télécharger pdf (Page 14)

SETUP AND OPERATION CHAPTER 2

2-8

stops giving line numbers when two < CR> 's are

received.

3. U se labels after GO TO and G OSUB statements.

Do not assign line numbers (except as noted in 4

below) since they will change.

4. ON GOTO and O N GOSUB cannot use labels.

The trick here is to assign a line num ber way high in

the program count. Then, at these lines, use GOTO

.. label. NOLIN ES.BAS shows how this is done.

Use the AUTO statement to segment your program.

AUT O can num ber star ting at any location. T his is

useful to place ON G OTO and ON G OSUB locations.

AUTO is terminated when two sequential < CR> ’s are

received.

PROGRAMMING TIPS

Manuals can be full of information. Sometimes it’s

overwhelming. This section presents a few tips our

customers have given us over the past 15 years.

Finding variables, keywor ds, and labels

The FIND statem ent will search for program labels,

variable names, or even command keyw ords. Look in

the CAMBA SIC Programming Manual for more

information.

Faster, shorter IF-THEN's

IF-THEN statements are based on zero and non-zero

flags. Consider the following program fragment

a = 5

if a then ..there

executes quicker than

a = 5

if a < > 0 then goto ..there

Notice 2 elements are missing First is the inequality test

< > . Next is GOTO . The progr am line is an implied

GOTO.

Another var iation is

a = 5

if a goto ..there

The THEN is implied but you must supply the keyword

GOT O or GOSUB.

Use parenth esis (or brackets)

When IF-THEN statements do not execute properly (and

formulas too), break it up using parens. For example:

IF A - B*C AND D = C*B - D/8 OR 15 THEN ...

The question the compiler asks is "What are you doing

here?" True, there is an order of precedence, but often

times the assumptions made by the programmer vs

compiler order will differ. Use parens as shown below.

IF A-(B*(C AND D))=C*B-((D/8)OR15) THEN

Generally, you can go 7 levels of parens without

reaching the compilers limit.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 82 83

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Remote-processing RPC-2350 Manuel d'utilisateur Page 14

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