precedence
operator
description
example
associativity1()
->.::
++--
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 right2!
~++---
+*&(type)
sizeof
logical negation
bitwise complement
pre-increment
pre-decrement
unary minus
unary plus
dereference
address of
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 right4*
/%multiplication
division
modulus
int i = 2 * 4;
float f = 10 / 3;
int rem = 4 % 3;
left to right5+
-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-than
comparison less-than-or-equal-to
comparison greater-than
comparison geater-than-or-equal-to
if( i < 42 ) ...
if( i <= 42 ) ...
if( i > 42 ) ...
if( i >= 42 ) ...
left to right8==
!=comparison equal-to
comparison not-equal-to
if( i == 42 ) ...
if( i != 42 ) ...
left to right9&
bitwise and
flags = flags & 42;
left to right10^
bitwise exclusive or
flags = flags ^ 42;
left to right11|
bitwise inclusive (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 left15=
+=-=
*=/=
%=&=
^=|=
<<=
>>=
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 inclusive (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 left16,
sequential evaluation operator
for( i = 0, j = 0; i < 10; i++, j++ ) ...
left to right
運算子優先順序 C 運算子優先順序
c 運算子優先順序 優先順序運算子 描述方向1 scope resolution 範圍解析 left to right 2 suffix postfix increment and decrement 字首 字尾遞增和遞減 function call 函式呼叫 array subscripting ...
C語言運算優先順序
圓方括號 箭頭一句號，自增自減非反負 針強位址長度，乘除，加減，再移位，小等大等 等等不等，八位與，七位異，六位或，五與，四或，三疑，二賦，一真逗。其中 號為乙個等級分段。1級 左結合 圓括號 下標運算子 指向結構體成員運算子 結構體成員運算子。2級 右結合 邏輯非運算子 按位取反運算子 字首增量運...
python運算優先順序
運算子優先順序 下面的優先順序高 運算子 描述 lambda lambda表示式 or 布林 或 and 布林 與 not x 布林 非 innot in 成員測試 isis not 同一性測試 比較 按位或 按位異或 按位與 移位 加法與減法 乘法 除法 與取餘 x，x 正負號 x 按位翻轉 指數...