Dataq DI-159, Руководство пользователя

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DI-159 PLC Hardware Manual StickOS
Expressions
the following operators are supported as in C, in order of decreasing precedence:
n
decimal constant
0xn
hexadecimal constant
'c’
character constant
variable simple variable
variable[expression]
array variable element
variable#
length of array or string
( )
grouping
! ~
logical not, bitwise not
* / %
multiply, divide, mod
+ -
add, subtract
>> <<
shift right, left
<= < >= > inequalities
== !=
equal, not equal
| ^ &
bitwise or, xor, and
|| ^^ &&
logical or, xor, and
Strings
V$ is a null-terminated view into a byte array v[]
string statements:
dim, input, let, print,
vprint
if expression relation
expression
then
while expression relation
expression
do until expression rela-
tion expression
string expressions:
" literal "
literal string
variable $
variable string variable$
[ start:length ]
variable substring
+
concatenates strings
string relations:
<= < >= >
inequalities
== !=
equal, not equal
~ !~
contains, does not contain
General Statements
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