Holtek HT-IDE, User Manual

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Conditional operators
The conditional operator ?: is a shortcut for executing a statement between
two selectable statements according to the result of the expression.
<expr> ? <statement1> : <statement2>
If <expr> evaluates to a nonzero value, <statement1> is executed. Other-
wise, <satement2> is executed.
Comma operator
A pair of expressions separated by a comma is evaluated from left-to-right
and the value of the left expression is discarded. All side effects of the left
expression are performed before the evaluation of the right expression. The
type and value of the result are the type and value of the right operand. For
example,
f(a, (t=3, t+2), c) ;
has three arguments, the second of which has the value 5.
Precedence and associativity of operators
The following table lists the precedence and associativity of operators. The
precedence is from the highest to the lowest. Each box holds operators with
the same precedence. Unary and assignment operators are right associa-
tive, all others are left associative.
Operators Description Associativity
[ ]
( )
–>
.
sizeof subscription
parenthesis
structure pointer
structure member
size of type increment left to right
++
– –
~
!
–
+
&
* increment
dcrement
complement
not
unary minus
unary plus
address of
dereference right to left
*
/
% multiply
divide
modulus (remainder) left to right
Chapter 9 Holtek C Language
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