C Operator Precedence
The following table lists the precedence and associativity of C operators. Operators are listed top to bottom, in descending precedence.
| 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 | 
When parsing an expression, an operator which is listed on some row will be bound tighter (as if by parentheses) to its arguments than any operator that is listed on a row further below it.
Operators that are in the same cell (there may be several rows of operators listed in a cell) have the same precedence and are grouped in the given direction. For example, the expression a=b=c is parsed as a=(b=c), and not as (a=b)=c because of right-to-left associativity. Note that this does not affect the evaluation order of the subexpressions a, b, and c.
[edit] See Also
Order of evaluation of operator arguments at run time.
| Common operators | ||||||
|---|---|---|---|---|---|---|
| assignment | increment decrement | arithmetic | logical | comparison | member access | other | 
| a = b | ++a | +a | !a | a == b | a[b] | a(...) | 
| C++ documentation for C++ operator precedence | 


