Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario descargar pdf (Pagina 124)

Operating Functions

Chapter 5

5–87

5.10.3.9

Determine Length of a String – CALL 68

This routine determines the length of a string. One input argument is

expected. This is the string number on which the routine acts. One output

argument is required. It is the actual number of non-carriage return (CR)

characters in this string. This is similar to the BASIC command LEN(str$).

(Example: L=LEN($1)).

u10 REM SAMPLE OF STRING LENGTH

u20 STRING 100,10

u30 $(1)=“1234567”

u40 PUSH 1 :REM BASE STRING

u50 CALL 68 :REM INVOKE STRING LENGTH ROUTINE

u60 POP L :REM GET LENGTH OF BASE STRING

u70 PRINT “THE LENGTH OF ”,$(1),“ IS ”,L

u80 END

uRUN

THE LENGTH OF 1234567 IS 7

READY

The following sections list and describe the memory support calls you can

use with the BASIC Module. All strings, arrays and variables are shared.

5.10.3

String Support Calls

(continued)

5.1

Memory Support Calls

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 166 167

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario Pagina 124