C operators priority
| priority |
Operators |
Name or meaning |
Use the form |
Joining direction |
Explanation |
| 1 |
[] |
Array subscript |
Array name [constant expression] |
Left to right |
-- |
| () |
Parentheses |
(Expression) / function name (parameter list) |
-- |
||
| . |
Member selection (objects) |
Object. Member Name |
-- |
||
| -> |
Member selection (pointer) |
Object pointer -> member name |
-- |
||
| 2 |
- |
Operators negative |
-expression |
Right to Left |
Unary operator |
| ~ |
Bitwise operator |
~ Expression |
|||
| ++ |
Increment operator |
++ variable names / variable names + |
|||
| -- |
Decrement operator |
- variable names / variable names - |
|||
| * |
Dereferencing operator |
* Pointer variable |
|||
| & |
The address operator |
&variable name |
|||
| ! |
Logical NOT operator |
!expression |
|||
| (Types of) |
Cast |
(Data type) expression |
-- |
||
| sizeof |
Operators length |
sizeof (expression) |
-- |
||
| 3 |
/ |
except |
Expressions / Expression |
Left to right |
Binary operator |
| * |
Multiply |
Expression * expression |
|||
| % |
The remainder (modulo) |
Integer expression integer expression% |
|||
| 4 |
+ |
plus |
Expression + expression |
Left to right |
Binary operator |
| - |
Less |
Expressions - Expressions |
|||
| 5 |
<< |
The left |
Variable << expression |
Left to right |
Binary operator |
| >> |
Right |
Variable >> expression |
|||
| 6 |
> |
more than the |
Expressions> Expressions |
Left to right |
Binary operator |
| >= |
greater or equal to |
Expression> = expression |
|||
| < |
Less than |
Expression <expression |
|||
| <= |
Less than or equal |
Expression <= expression |
|||
| 7 |
== |
equal |
Expression == expression |
Left to right |
Binary operator |
| ！= |
not equal to |
Expression! = Expression |
|||
| 8 |
& |
Bitwise AND |
Expression & expression |
Left to right |
Binary operator |
| 9 |
^ |
Bitwise XOR |
Expression ^ expression |
Left to right |
Binary operator |
| 10 |
| |
Bitwise or |
Expressions | Expression |
Left to right |
Binary operator |
| 11 |
&& |
Logic and |
Expression && expression |
Left to right |
Binary operator |
| 12 |
|| |
Logical or |
Expressions Expressions || |
Left to right |
Binary operator |
| 13 |
?: |
Conditional operator |
1 expression? Expression 2: Expression 3 |
Right to Left |
Ternary operator |
| 14 |
= |
Assignment Operators |
Variable = expression |
Right to Left |
-- |
| /= |
In addition to the assignment |
Variable / = Expression |
-- |
||
| *= |
Take after the assignment |
Variable * = Expression |
-- |
||
| %= |
After the assignment modulo |
Variable = expression% |
-- |
||
| += |
After the addition of the assignment |
Variable + = Expression |
-- |
||
| -= |
After subtraction assignment |
Variable - = Expression |
-- |
||
| <<= |
Left after the assignment |
<< expression variable = |
-- |
||
| >>= |
Right after the assignment |
= Expression variable >> |
-- |
||
| &= |
Bitwise and after the assignment |
Variable & = Expression |
-- |
||
| ^= |
After pressing bit XOR assignment |
Variable expression ^ = |
-- |
||
| |= |
After pressing position or assignment |
Variable | = expression |
-- |
||
| 15 |
， |
Comma operator |
Expression, expression, ... |
Left to right |
-- |
Description:
the same priority of operators, the order of operations is determined by the binding direction.
简单记就是：！ > 算术运算符 > 关系运算符 > && > || > 赋值运算符
加减法 " + - " 高于 按位左移右移 ” << >> " 高于 按位运算符 " & | ^ "