C-language symbol precedence

Source: Internet
Author: User
Tags bitwise

Priority level

Operator

Name or meaning

Use form

Combination direction

Description

1

[]

Array subscript

array name [constant expression]

Left to right

()

Parentheses

(expression)/function name (formal parameter list)

.

Member selection (object)

Object. Member name

-

Member selection (pointer)

Object pointers, member names

2

-

Minus sign operator

-expression

Right to Left

Monocular operator

Type

Forcing type conversions

(data type) expression

++

Self-increment operator

+ + variable name/variable name + +

Monocular operator

--

Self-decrement operator

--Variable name/variable name--

Monocular operator

*

Value operator

* Pointer variable

Monocular operator

&

Fetch address operator

& Variable Name

Monocular operator

!

Logical non-operator

! An expression

Monocular operator

~

Bitwise inverse operator

~ Expression

Monocular operator

sizeof

Length operator

sizeof (expression)

3

/

Except

An expression/expression

Left to right

Binocular operator

*

By

Expression-expression *

Binocular operator

%

Remainder (modulo)

Integer expression/integer expression

Binocular operator

4

+

Add

An expression + an expression

Left to right

Binocular operator

-

Reducing

Expression-expression

Binocular operator

5

<<

Move left

Variables << expressions

Left to right

Binocular operator

>>

Move right

Variables >> expressions

Binocular operator

6

>

Greater than

Expressions > expressions

Left to right

Binocular operator

>=

Greater than or equal

Expression->= expression

Binocular operator

<

Less than

Expressions < expressions

Binocular operator

<=

Less than or equal

Expression-<= expression

Binocular operator

7

==

Equals

Expression-= = Expression

Left to right

Binocular operator

!=

Not equal to

Expression! = Expression

Binocular operator

8

&

Bitwise-AND

Expressions & Expressions

Left to right

Binocular operator

9

^

Bitwise XOR OR

An expression ^ expression

Left to right

Binocular operator

10

|

Bitwise OR

Expression-expression

Left to right

Binocular operator

11

&&

Logic and

Expressions && Expressions

Left to right

Binocular operator

12

||

Logical OR

An expression | | An expression

Left to right

Binocular operator

13

?:

Conditional operators

Expression 1? Expression 2: Expression 3

Right to Left

Trinocular operator

14

=

Assignment operators

variable = expression

Right to Left

/=

Assign value after addition

Variable-/= expression

*=

Multiply post-Assign value

Variable-*= expression

%=

Assign value after modulo

Variable-%= expression

+=

Add after Assignment

Variable + = expression

-=

Reduced-value Assignment

Variable-= expression

<<=

Assign value after left shift

Variable-<<= expression

>>=

Assign value after right shift

Variable->>= expression

&=

Bitwise AND post-assigned values

Variable-&= expression

^=

Bitwise XOR or post-assignment

Variable-^= expression

|=

Bitwise OR post-assigned value

Variable-|= expression

15

,

Comma operator

expression, expression,...

Left to right

Left-to-right sequential operation

Description

Operators of the same precedence, the order of operations is determined by the binding direction.

Priority formula

parenthesis member first; parentheses operator [] () member operator. -

All monocular second; All monocular operators such as + + + (positive)-(negative) pointer operation *&

Multiplication Yozo, plus minus four; this "remainder" means the residual operation is%

Shift five, relationship six, shift operator:<< >>, relationship:> < >= <=, etc.

Equals (and) unequal row seventh; = = = = =

Bits and Xor and bits or; these are bitwise operations: Bits and (&) XOR (^) bits or (|)

"Three points of the world" eighty or ninety;

logical or heel; logical Operator: | | and &&

12 and 11; Note order: Priority (| |) Bottom-to-priority (&&)

The condition is higher than the assignment, the three-mesh operator precedence is ranked to 13-bit only than the assignment operator and the "," high

Lowest comma operation level! The comma operator has the lowest precedence

C-language symbol precedence

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