标签:des com http blog class div code size log c tab
不能光转贴,有空要熟悉之后,要写点心得。现在发现 . 的优先级确实很高。
C:
Precedence | Operator | Description | Associativity |
---|---|---|---|
1 | ++ -- |
Suffix/postfix increment and decrement | Left-to-right |
() |
Function call | ||
[] |
Array subscripting | ||
. |
Structure and union member access | ||
?> |
Structure and union member access through pointer | ||
(type){list} |
Compound literal(C99) | ||
2 | ++ -- |
Prefix increment and decrement | Right-to-left |
+ ? |
Unary plus and minus | ||
! ~ |
Logical NOT and bitwise NOT | ||
(type) |
Type cast | ||
* |
Indirection (dereference) | ||
& |
Address-of | ||
sizeof |
Size-of | ||
_Alignof |
Alignment requirement(C11) | ||
3 | * / % |
Multiplication, division, and remainder | Left-to-right |
4 | + ? |
Addition and subtraction | |
5 | << >> |
Bitwise left shift and right shift | |
6 | < <= |
For relational operators < and ≤ respectively | |
> >= |
For relational operators > and ≥ respectively | ||
7 | == != |
For relational = and ≠ respectively | |
8 | & |
Bitwise AND | |
9 | ^ |
Bitwise XOR (exclusive or) | |
10 | | |
Bitwise OR (inclusive or) | |
11 | && |
Logical AND | |
12 | || |
Logical OR | |
13 | ?: |
Ternary conditional | Right-to-Left |
14 | = |
Simple assignment | |
+= ?= |
Assignment by sum and difference | ||
*= /= %= |
Assignment by product, quotient, and remainder | ||
<<= >>= |
Assignment by bitwise left shift and right shift | ||
&= ^= |= |
Assignment by bitwise AND, XOR, and OR | ||
15 | , |
Comma | Left-to-right |
C++:
Precedence | Operator | Description | Associativity |
---|---|---|---|
1 | :: |
Scope resolution | Left-to-right |
2 | ++ -- |
Suffix/postfix increment and decrement | |
() |
Function call | ||
[] |
Array subscripting | ||
. |
Element selection by reference | ||
?> |
Element selection through pointer | ||
3 | ++ -- |
Prefix increment and decrement | Right-to-left |
+ ? |
Unary plus and minus | ||
! ~ |
Logical NOT and bitwise NOT | ||
(type) |
Type cast | ||
* |
Indirection (dereference) | ||
& |
Address-of | ||
sizeof |
Size-of | ||
new , new[] |
Dynamic memory allocation | ||
delete , delete[] |
Dynamic memory deallocation | ||
4 | .* ->* |
Pointer to member | Left-to-right |
5 | * / % |
Multiplication, division, and remainder | |
6 | + ? |
Addition and subtraction | |
7 | << >> |
Bitwise left shift and right shift | |
8 | < <= |
For relational operators < and ≤ respectively | |
> >= |
For relational operators > and ≥ respectively | ||
9 | == != |
For relational = and ≠ respectively | |
10 | & |
Bitwise AND | |
11 | ^ |
Bitwise XOR (exclusive or) | |
12 | | |
Bitwise OR (inclusive or) | |
13 | && |
Logical AND | |
14 | || |
Logical OR | |
15 | ?: |
Ternary conditional | Right-to-left |
= |
Direct assignment (provided by default for C++ classes) | ||
+= ?= |
Assignment by sum and difference | ||
*= /= %= |
Assignment by product, quotient, and remainder | ||
<<= >>= |
Assignment by bitwise left shift and right shift | ||
&= ^= |= |
Assignment by bitwise AND, XOR, and OR | ||
16 | throw |
Throw operator (for exceptions) | |
17 | , |
Comma | Left-to-right |
很有意思的几个举例:
http://www.cnblogs.com/maowang1991/archive/2012/12/07/2807086.html
标签:des com http blog class div code size log c tab
原文地址:http://www.cnblogs.com/findumars/p/3697083.html