Priority List of C and C ++ Operators

 

C, C ++ operator Priority List 1. C language operator priority

Operators are arranged from top to bottom according to their priority values. operators in the same row have the same priority. The second line is all unary operators.
 

Operator	Explanation	Combination Method
() []->.	Parentheses (functions, etc.), arrays, two types of structure member access	From left to right
! ~ ++ -- +- * & (Type) sizeof	Negative, bitwise negative, incremental, reduced, positive and negative, Indirect, address fetch, type conversion, and Size Estimation	From right to left
*/%	Multiplication, division, modulo	From left to right
+-	Add, subtract	From left to right
<>	Left shift, right shift	From left to right
<<=>=>	Less than, less than or equal to, greater than or equal to, greater	From left to right
=! =	Equal to, not equal	From left to right
&	Bitwise AND	From left to right
^	Bitwise OR	From left to right
|	By bit or	From left to right
&&	Logic and	From left to right
|	Logic or	From left to right
? :	Condition	From right to left
= + =-= * =/= <=>>=	Various assignments	From right to left
,	Comma (Order)	From left to right

 

2. c ++ operator priority

Precedence	Operator	Description	Example	Associativity
1	() [] -> . :: ++ --	Grouping Operator Array access Member access from a pointer Member access from an object Scoping Operator Post-Increment Post-Decrement	(A + B)/4; Array [4] = 2; PTR-> age = 34; OBJ. Age = 34; Class: age = 2; For (I = 0; I <10; I ++ )... For (I = 10; I> 0; I --)...	Left to right
2	! ~ ++ -- - + * & (Type) Sizeof	Logical Negation Bitwise Complement Pre-Increment Pre-Decrement Unary minus Unary plus Dereference Address Cast to a given type Return size in bytes	If (! Done )... Flags = ~ Flags; For (I = 0; I <10; ++ I )... For (I = 10; I> 0; -- I )... Int I =-1; Int I = + 1; Data = * PTR; Address = & OBJ; Int I = (INT) floatnum; Int size = sizeof (floatnum );	Right to left
3	-> * .*	Member pointer Selector Member pointer Selector	PTR-> * Var = 24; OBJ. * Var = 24;	Left to right
4	* / %	Multiplication Division Modulus	Int I = 2*4; Float F = 10/3; Int REM = 4% 3;	Left to right
5	+ -	Addition Subtraction	Int I = 2 + 3; Int I = 5-1;	Left to right
6	< >	Bitwise shift left Bitwise shift right	Int flags = 33 <1; Int flags = 33> 1;	Left to right
7	< <= > > =	Comparison less- Comparison less-than-or-Equal- Comparison greater- Comparison geater-than-or-Equal-	If (I <42 )... If (I <= 42 )... If (I> 42 )... If (I> = 42 )...	Left to right
8	= ! =	Comparison equal- Comparison not-Equal-	If (I = 42 )... If (I! = 42 )...	Left to right
9	&	Bitwise AND	Flags = flags & 42;	Left to right
10	^	Bitwise exclusive or	Flags = flags ^ 42;	Left to right
11	|	Bitwise random sive (normal) or	Flags = flags | 42;	Left to right
12	&&	Logical and	If (conditiona & conditionb )...	Left to right
13	|	Logical or	If (conditiona | conditionb )...	Left to right
14	? :	Ternary conditional (if-then-else)	Int I = (A> B )? A: B;	Right to left
15	= + = -= * = /= % = & = ^ = | = <= >>=	Assignment operator Increment and assign Decrement and assign Multiply and assign Divide and assign Modulo and assign Bitwise AND and assign Bitwise exclusive or and assign Bitwise random sive (normal) or and assign Bitwise shift left and assign Bitwise shift right and assign	Int A = B; A + = 3; B-= 4; A * = 5; A/= 2; A % = 3; Flags & = new_flags; Flags ^ = new_flags; Flags | = new_flags; Flags <= 2; Flags> = 2;	Right to left
16	,	Sequential uation Operator	For (I = 0, j = 0; I <10; I ++, J ++ )...	Left to right