LB Booster - Compatibility problem

LB Booster

Programming

Liberty BASIC language (Moderator: Richard Russell)

Compatibility problem

« Previous Topic | Next Topic »

Pages: 1

Author

Topic: Compatibility problem (Read 201 times)

mmiscool
New Member

member is offline

Posts: 19

Compatibility problem
« Thread started on: Jul 24^th, 2017, 03:33am »

Running the following code in LB produces different results.

Code:

MYSTRING$ = CHR$(34);"SOME TEXT";CHR$(34);";";CHR$(34);" SOME MORE TXT";CHR$(34)
NOTICE MYSTRING$
NOTICE EVAL$(MYSTRING$)

I would expect the strings to concatenated with each other in the eval$() function.

Logged

Richard Russell
Administrator

member is offline

Posts: 1348

Re: Compatibility problem
« Reply #1 on: Jul 24^th, 2017, 08:14am »

on Jul 24^th, 2017, 03:33am, mmiscool wrote:

I would expect the strings to concatenated with each other in the eval$() function.

No. This is what it says in the LBB help file: "The EVAL function works only with simple expressions containing 'standard' BASIC functions". The use of the semicolon to concatenate strings is far from standard, in fact as far as I know it is unique to Liberty BASIC and Just BASIC.

To make it compatible with LBB you would need to replace the semicolons with the standard means of concatenating strings in BASIC, which is the plus sign:

Code:

MYSTRING$ = CHR$(34)+"SOME TEXT"+CHR$(34)+"+"+CHR$(34)+" SOME MORE TXT"+CHR$(34)
NOTICE MYSTRING$
NOTICE EVAL$(MYSTRING$)

Richard.

Logged

tsh73
Full Member

member is offline

Gender:

Posts: 210

Re: Compatibility problem
« Reply #2 on: Jul 24^th, 2017, 08:44am »

It's easy to forget that things you used to are not in fact "standard".
Nice to know that one, thanks.

Logged

Pages: 1


« Previous Topic \| Next Topic »