C + + operator precedence

Source: Internet
Author: User
Tags bitwise

Priority Level operator Description Example Binding Nature
1 ()
[]
-
.
::
++
--
The parentheses operator that adjusts the precedence
Array Subscript access operator
To access a member's operator by pointing to the object's pointer
Operator that accesses members through the object itself
Scope operator
Post increment operator
Post-decrement operator
(A + B)/4;
ARRAY[4] = 2;
Ptr->age = 34;
Obj.age = 34;
Class::age = 2;
for (i = 0; i <; i++) ...
for (i = ten; i > 0; i--) ...
From left to right
2 !
~
++
--
-
+
*
&
(type)
sizeof
logical inverse operator
bitwise inverse

pre-decrement operator
unary minus operator
unary take positive operator
Span style= "FONT-SIZE:18PX;" > dereference operator
fetch address operator

Returns the number of bytes occupied by the object operator
if (!done) ...
Flags = ~flags;
for (i = 0; i <; ++i) ...
for (i = ten; i > 0; i.) ...
int i =-1;
int i = +1;
data = *ptr;
Address = &obj;
int i = (int) floatnum;
int size = sizeof (floatnum);
From right to left
3 ->*
.*

obj.*var =; left-to-right
4 *
/
%
multiplication operator
division operator
Span style= "FONT-SIZE:18PX;" > Take the remainder operator
int i = 2 * 4;
float f = 10/3;
int rem = 4 3;
left-to-right
5 +
-

subtraction operator
int i = 2 + 3;
int i = 5-1;
left-to-right
6 <<
bitwise left SHIFT operator
bitwise right SHIFT operator
int flags = << 1;
int flags = >> 1;
left-to-right
7 <
>
Span style= "FONT-SIZE:18PX;" >>=
less than comparison operator
is less than or equal to the comparison operator
greater than the comparison operator
if (i <) ...
if (i <=) ...
if (i >) ...
if (i >=) ...
left-to-right
8 ==
!=
equals comparison operator
Not equal to comparison operator
if (i = = 42) ...
if (i! = 42) ...
From left to right
9 & Bitwise AND operator Flags = flags & 42; From left to right
10 ^ Bitwise XOR OR operator Flags = flags ^ 42; From left to right
11 | Bitwise OR operator Flags = Flags | 42; From left to right
12 && Logic and operators if (Conditiona && conditionb) ... From left to right
13 || Logical OR operator if (Conditiona | | conditionb) ... From left to right
14 ? : Ternary conditional operator int i = (a > B)? A:B; From right to left
15 =
+=
-=
*=
/=
%=
&=
^=
Span style= "FONT-SIZE:18PX;" >|=
<<=
>>=


compound assignment operator (subtraction)

compound assignment operator (division)

compound assignment operator (bitwise AND)

compound assignment operator (bitwise OR)

compound assignment operator (bitwise right SHIFT)
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;
From right to left
16 , Comma operator for (i = 0, j = 0; i <; i++, J + +) ... From left to right

C + + operator precedence

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