C-language operator precedence list (Super detailed---reprint plus own exercise)

Source: Internet
Author: User
Tags arithmetic operators bitwise

Reproduced in: http://www.jb51.net/article/37282.htm

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C-language operator precedence

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

~

Bitwise inverse operator

~ Expression

++

Self-increment operator

+ + variable name/variable name + +

--

Self-decrement operator

--Variable name/variable name--

*

Value operator

* Pointer variable

&

Fetch address operator

& Variable Name

!

Logical non-operator

! An expression

Type

Forcing type conversions

(data type) expression

--

sizeof

Length operator

sizeof (expression)

--

3

/

Except

An expression/expression

Left to right

Binocular operator

*

By

Expression-expression *

%

Remainder (modulo)

Integer expression% integer expression

4

+

Add

An expression + an expression

Left to right

Binocular operator

-

Reducing

Expression-expression

5

<<

Move left

Variables << expressions

Left to right

Binocular operator

>>

Move right

Variables >> expressions

6

>

Greater than

Expressions > expressions

Left to right

Binocular operator

>=

Greater than or equal

Expression->= expression

<

Less than

Expressions < expressions

<=

Less than or equal

Expression-<= expression

7

==

Equals

Expression-= = Expression

Left to right

Binocular operator

! =

Not equal to

Expression! = Expression

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

--

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

Simple Note is:! > Arithmetic operators > Relational operators > && > | | > Assignment Operators

Example:

Combine the following examples to analyze:

EG1:

int  k=7; int x=;p rintf ("%d\n", x%= (k%=5)); // the remainder operator in parentheses first obtains the  result x%=2; // then calculate the x=x%2;  Result is 0

EG2:

int k=7; int x=;p rintf ("%d\n", x%=k-k%5);  // operation result is 2

EG3:

int n=, i=4;p rintf ("%d\n", n%=i+1);  // operation result is 0 // %= (take remainder assignment operator) priority is lower than +

C-language operator precedence list (Super detailed---reprint plus own exercise)

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