Campbell CR800 Series, Operator'S Manual

Page: 306 / 598

Section 7. Installation
306
'following destination variables is String because Str() array is declared As String.
I = 0
I += 1
Str(I) = 1 + 2 + "hey" + 4 + 5 + "6"
'= 3hey456
I += 1
Str(I) = 1 + 2 + "hey" + (4 + 5) + "6"
'= 3hey96
NextScan
EndProg
7.7.18.3 String NULL Character
All strings are automatically NULL terminated. NULL is the same as Chr( 0 ) or
"", counts as one of the characters in the string. Assignment of just one character
is that character followed by a NULL, unless the character is a NULL.
String NULL Character Examples
Expression Comments Resul
t
LongVar(5) = "#"-""
Subtract NULL, ASCII code
results
35
LongVar(6) = StrComp("#","")
Also subtracts NULL
35
Example:
Objective:
Insert a NULL character into a string, and then reconstitute the string.
Given:
StringVar(3) = "123456789"
Execute:
StringVar(3,1,4) = "" "123<NULL>56789"
Results:
StringVar(4) = StringVar(3) "123"
but,
StringVar(3) still = "123<NULL>56789",
so,
StringVar(5) = StringVar(3,1,4+1)
'"56789"
StringVar(6) = StringVar(3) + 4 + StringVar(3,1,4+1)
'"123456789"