运算符优先级总结

Java 运算符优先级

运算符	优先级
postfix	expr++ expr–
unary	++expr --expr +expr -expr ~ !
multiplicative	* / %
additive	+ -
shift	<< >> >>>
relational	< > <= >= instanceof
equality	== !=
bitwise AND	&
bitwise exclusive OR	^
bitwise inclusive OR	|
logical AND	&&
logical OR	||
ternary	? :
assignment	= += -= *= /= %= &= ^= |= <<= >>= >>>=

C++ 运算符优先级

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

C语言运算符优先级

Precedence	Operator	Description	Associativity
1	++ --	Suffix/postfix increment and decrement	Left-to-right
	()	Function call	Left-to-right
	[]	Array subscripting	Left-to-right
	.	Structure and union member access	Left-to-right
	−>	Structure and union member access through pointer	Left-to-right
	(*type*){*list*}	Compound literal(C99)	Left-to-right
2	++ --	Prefix increment and decrement	Right-to-left
	+ −	Unary plus and minus	Right-to-left
	! ~	Logical NOT and bitwise NOT	Right-to-left
	(*type*)	Type cast	Right-to-left
	*	Indirection (dereference)	Right-to-left
	&	Address-of	Right-to-left
	sizeof	Size-of	Right-to-left
	_Alignof	Alignment requirement(C11)	Right-to-left
3	* / %	Multiplication, division, and remainder	Left-to-right
4	+ −	Addition and subtraction	Left-to-right
5	<< >>	Bitwise left shift and right shift	Left-to-right
6	< <=	For relational operators < and ≤ respectively	Left-to-right
	> >=	For relational operators > and ≥ respectively	Left-to-right
7	== !=	For relational = and ≠ respectively	Left-to-right
8	&	Bitwise AND	Left-to-right
9	^	Bitwise XOR (exclusive or)	Left-to-right
10	`	`	Bitwise OR (inclusive or)
11	&&	Logical AND	Left-to-right
12	`		`
13	?:	Ternary conditional	Right-to-Left
14	=	Simple assignment	Right-to-Left
	+= −=	Assignment by sum and difference	Right-to-Left
	*= /= %=	Assignment by product, quotient, and remainder	Right-to-Left
	<<= >>=	Assignment by bitwise left shift and right shift	Right-to-Left
	&= ^= `	=`	Assignment by bitwise AND, XOR, and OR
15	,	Comma	Left-to-right

PHP 运算符优先级

结合方向	运算符	附加信息
非结合	clone new	clone 和 new
左	[	array()
非结合	++ --	递增／递减运算符
非结合	~ - (int) (float) (string) (array) (object) (bool) @	类型
非结合	instanceof	类型
右结合	!	逻辑操作符
左	* / %	算术运算符
左	+ - .	算术运算符 和 字符串运算符
左	<< >>	位运算符
非结合	< <= > >= <>	比较运算符
非结合	== != === !==	比较运算符
左	&	位运算符 和 引用
左	^	位运算符
左	`	`
左	&&	逻辑运算符
左	`
左	? :	三元运算符
右	`= += -= *= /= .= %= &=	= ^= <<= >>=`
左	and	逻辑运算符
左	xor	逻辑运算符
左	or	逻辑运算符
左	,	多处用到

Python 运算符优先级

运算符	描述
'expression,...'	字符串转换
{key:datum,...}	字典显示
[expression,...]	列表显示
(experession,...)	绑定或元组显示
f(arguments...)	函数调用
x[index:index]	寻址段
x[index]	下标
x.attribute	属性参考
**	指数
~x	按位翻转
+x，-x	正负号
*，/，%	乘法、除法与取余
+，-	加法与减法
<<，>>	移位
&	按位与
^	按位异或
`	`
<，<=，>，>=，!=，==	比较
is，is not	同一性测试
in，not in	成员测试
not x	布尔“非”
and	布尔“与”
or	布尔“或”
lambda	Lambda表达式