Campbell CR3000 Micrologger, Руководство оператора

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Section 7. Installation
328
7.7.19.1 String Operators
The table String Operators
(p. 328)
lists and describes available string operators.
String operators are case sensitive.
String Operators
Operator Description
&
Concatenates strings. Forces numeric values to strings
before concatenation.
Example
1 & 2 & 3 & "a" & 5 & 6 & 7 = "123a567"
+
Adds numeric values until a string is encountered. When a
string is encountered, it is appended to the sum of the
numeric values. Subsequent numeric values are appended as
strings.
Example:
1 + 2 + 3 + "a" + 5 + 6 + 7 = "6a567"
-
"Subtracts" NULL ("") from the end of ASCII characters for
conversion to an ASCII code (LONG data type).
Example:
"a" - "" = 97
ASCII codes of the first characters in each string are
compared. If the difference between the codes is zero, codes
for the next characters are compared. When unequal codes
or NULL are encountered (NULL terminates all strings), the
difference between the last compared ASCII codes is
returned.
Examples:
Note —
ASCII code for a = 97, b = 98, c = 99, d = 100, e =
101, and all strings end with NULL.
Difference between NULL and NULL
"abc" - "abc" = 0
Difference between e and c
"abe" - "abc" = 2
Difference between c and b
"ace" - "abe" = 1
Difference between d and NULL
"abcd" - "abc" = 100