Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario descargar pdf (Pagina 116)

Operating Functions

Chapter 5

5–79

Example program 3:

10 REM STRING ALLOCATION COMPUTATION KNOWING:

20 REM 1) AMOUNT OF STRING MEMORY 2) #OF STRING VARIABLES

30 PRINT: PRINT

40 INPUT “ENTER # OF BYTES OF MEMORY YOU CAN ALLOCATE FOR STRINGS”N

50 INPUT “HOW MANY STRING VARIABLES WILL YOU NEED”V

60 PRINT

70 C=INT(((N-1)/V)-1) : REM COMPUTE THE # OF CHARACTERS/STRING

80 N=(V*(C+1))+1 : REM COMPUTE THE # OF BYTES OF MEMORY NEEDED

90 PRINT: PRINT

100 PRINT “YOU NEED TO ALLOCATE”,N,“BYTES OF MEMORY FOR”, V,“VARIABLES”

110 PRINT “CONTAINING”,“C,CHARACTERS EACH”

120 PRINT: PRINT

130 PRINT“ STRING”,N,“,”,C

140 END

uRUN

ENTER # OF BYTES OF MEMORY YOU CAN ALLOCATE FOR STRINGS 500

HOW MANY STRING VARIABLES WILL YOU NEED ? 15

YOU NEED TO ALLOCATE 496 BYTES OF MEMORY FOR 15 VARIABLES CONTAINING 32

CHARACTERS EACH

STRING 496 , 32

READY

5.10.3

String Support Calls

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual de usuario Pagina 116