Rockwell-automation 1771-DB Basic Module User Manual - Series A Instrukcja Użytkownika Pobierz pdf (Strona 115)

Operating Functions

Chapter 5

5–78

Example program 2:

uLIST

10 REM STRING ALLOCATION COMPUTATION KNOWING:

20 REM 1)# CHARACTERS IN LONGEST STRING 2) AMOUNT OF STRING MEMORY

30 PRINT : PRINT

40 INPUT “HOW MANY CHARACTERS IN YOUR LONGEST STRING”C

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

60 PRINT

70 V=INT((N-1)/(C+1)) : REM COMPUTE THE # OF POSSIBLE VARIABLES

80 N=(V*(C+1))+1 : REM COMPUTE HOW MUCH MEMORY IS ACTUALLY 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

HOW MANY CHARACTERS IN YOUR LONGEST STRING

?20

# OF BYTES OF MEMORY CAN YOU ALLOCATE FOR STRINGS

?500

YOU NEED TO ALLOCATE 485 BYTES OF MEMORY FOR 22 VARIABLES

CONTAINING 21 CHARACTERS EACH

STRING 485 , 21

READY

5.10.3

String Support Calls

(continued)

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 166 167

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Instrukcja Użytkownika Strona 115