C++ Operator Precedence

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The following table lists the precedence and associativity of C++ operators. Operators are listed top to bottom, in descending precedence.

Precedence	Operator	Description	Associativity
1	::	Scope resolution	Left-to-right
2	++ --	Suffix/postfix increment and decrement
	()	Function call
	[]	Array subscripting
	.	Element selection by reference
	->	Element selection through pointer
	typeid()	Run-time type information (see typeid)
	const_cast	Type cast (see const_cast)
	dynamic_cast	Type cast (see dynamic_cast)
	reinterpret_cast	Type cast (see reinterpret_cast)
	static_cast	Type cast (see static_cast)
3	++ --	Prefix increment and decrement	Right-to-left
	+ -	Unary plus and minus
	! ~	Logical NOT and bitwise NOT
	(type)	Type cast
	*	Indirection (dereference)
	&	Address-of
	sizeof	Size-of
	new, new[]	Dynamic memory allocation
	delete, delete[]	Dynamic memory deallocation
4	.* ->*	Pointer to member	Left-to-right
5	* / %	Multiplication, division, and remainder
6	+ -	Addition and subtraction
7	<< >>	Bitwise left shift and right shift
8	< <=	For relational operators < and ≤ respectively
	> >=	For relational operators > and ≥ respectively
9	== !=	For relational = and ≠ respectively
10	&	Bitwise AND
11	^	Bitwise XOR (exclusive or)
12	|	Bitwise OR (inclusive or)
13	&&	Logical AND
14	||	Logical OR
15	?:	Ternary conditional	Right-to-Left
16	=	Direct assignment (provided by default for C++ classes)
	+= -=	Assignment by sum and difference
	*= /= %=	Assignment by product, quotient, and remainder
	<<= >>=	Assignment by bitwise left shift and right shift
	&= ^= |=	Assignment by bitwise AND, XOR, and OR
17	throw	Throw operator (exceptions throwing)
18	,	Comma	Left-to-right

When parsing an expression, an operator which is listed on some row will be bound tighter (as if by parentheses) to its arguments than any operator that is listed on a row further below it. For example, the expression std::cout<<a&b is parsed as (std::cout<<a)&b and not std::cout<<(a&b).

Operators that are in the same cell (there may be several rows of operators listed in a cell) are evaluated with the same precedence, in the given direction. For example, the expressions *p++ and a=b=c are parsed as *(p++) and a=(b=c), and not as (*p)++ or (a=b)=c because of right-to-left associativity.

An operator's precedence is unaffected by overloading.

[edit] See also

Order of evaluation of operator arguments at run time.