ElmoMC Multi-Axis Motion Controller-Maestro - Manual (Page 85)

5.4.2 Semantics of Expressions
This section explains when, and in what order, expressions are evaluated.
5.4.2.1
Maestro Software Manual MAXL Program Language
MAN-MASSW (Ver. Q)
Order of Evaluation
This section discusses the order in which expressions are evaluated but does not
explain the syntax or the semantics of the operators in these expressions.
Consider this example:
function run()
int a , b , c, res1, res2, res3
a = 2
b = 4
c = 9
res1 = a + b * c
res2 = a + (b * c)
res3 = (a + b) * c
end function
The output from the preceding code is:
res1 = 38
res2 = 38
res3 = 54
The order in which the res1 is evaluated is determined by the precedence and
associativity of the operators:
1. Multiplication (*) has the highest precedence in this expression; hence the
sub expression b * c is evaluated first.
2. Addition (+) has the next highest precedence, so a is added to the product of
b
and c.
3. Assignment operator (=) has the lowest precedence in the expression.
When parentheses are used to group the sub expressions, they alter the precedence
and also the order in which the expression is evaluated
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