Operatori in C

Aggiungere alla fine gli operatori, che seguono un singolo operando soltanto.
Operatori di prefisso costituiti da un solo elemento, che precedono con un singolo operando.
Operatori binari, che prendono due operandi ed effettuano una variet� di funzionamenti logici ed aritmetici.
L'operatore condizionale (un operatore ternario), che prende tre operandi e valuta la seconda o terza espressione, secondo la valutazione della prima espressione soltanto.
Operatori di assegnazione, che assegnano soltanto un valore ad una variabile.
L'operatore di virgola, che d� a garanzie la valutazione da sinistra a destra delle espressioni virgola-separate.

Per generare le espressioni pi� complesse, le variabili ed i costanti possono essere usati insieme con gli operatori di C. Le seguenti tabelle descrive gli operatori differenti disponibili in c

Operator	Example	Description/Meaning
()	f()	Function call
[]	a[10]	Array reference
->		Structure and union member selection
.	s.a	Structure and union member selection
+ [unary]	+a	Value of a
- [unary]	-a	Negative of a
* [unary]	*a	Reference to object at address a
& [unary]	&a	Address of a
~	~a	One's complement of a
++ [prefix]	++a	The value of a after increment
++ [postfix]	a++	The value of a before increment
- - [prefix]	-a	The value of a after decrement
- - [postfix]	a-	The value of a before decrement
sizeof	sizeof (t1)	Size in bytes of object with type t1
sizeof	sizeof e	Size in bytes of object having the type of expression e
+ [binary] - [binary] * [binary] / %	a + b a - b a * b a / b a % b	a plus b a minus b a times b a divided by b Remainder of a/b
>> <<	a >> b a << b	a, right-shifted b bits a, left-shifted b bits
< > <= >= == !=	a < b a > b a <= b a >= b a == b a != b	1 if a < b; 0 otherwise 1 if a > b; 0 otherwise 1 if a <= b; 0 otherwise 1 if a >= b; 0 otherwise 1 if a equal to b; 0 otherwise 1 if a not equal to b; 0 otherwise
& [binary] \| ^	a & b a \| b a ^ b	Bitwise AND of a and b Bitwise OR of a and b Bitwise XOR (exclusive OR) of a and b
&& \|\| !	a && b a \|\| b !a	Logical AND of a and b (yields 0 or 1) Logical OR of a and b (yields 0 or 1) Logical NOT of a (yields 0 or 1)
?:	a ? e1 : e2	Expression e1 if a is nonzero; Expression e2 if a is zero
= += -= *= /= %= >>= <<= &= \|= ^= ,	a = b a += b a -= b a *= b a /= b a %= b a >>= b a <<= b a &= b a \|= b a ^= b e1,e2	a, after b is assigned to it a plus b (assigned to a) a minus b (assigned to a) a times b (assigned to a) a divided by b (assigned to a) Remainder of a/b (assigned to a) a, right-shifted b bits (assigned to a) a, left-shifted b bits (assigned to a) a AND b (assigned to a) a OR b (assigned to a) a XOR b (assigned to a) e2 (e1 evaluated first)

Precedenza degli operatori di C

Category	Operator	Associativity
Postfix	() [] -> . ++ - -	Left to right
Unary	+ - ! ~ ++ - - (type) * & `sizeof`	Right to left
Multiplicative	* / %	Left to right
Additive	+ -	Left to right
Shift	<< >>	Left to right
Relational	< <= > >=	Left to right
Equality	== !=	Left to right
Bitwise AND	&	Left to right
Bitwise XOR	^	Left to right
Bitwise OR	\|	Left to right
Logical AND	&&	Left to right
Logical OR	\|\|	Left to right
Conditional	?:	Right to left
Assignment	= += -= *= /= %= >>= <<= &= ^= \|=	Right to left
Comma	,	Left to right

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