C++ Operator Priority
C++ operator priority describes the order in which operations are performed when a computer evaluates an expression. Operations with higher priority are performed first, and then operations with lower priority are performed. For example, we often say that multiplication and division are performed first, and then addition and subtraction operations are performed.
| Precedence | Operator | Description | Associativity |
|---|---|---|---|
| 1 | :: | Range resolution | From left to right |
| 2 | ++ -- | Suffix increment/suffix decrement | |
| () | Parenthesis | ||
| [] | Array subscript | ||
| . | Member selection (object) | ||
| −> | Member selection (pointer) | ||
| 3 | ++ -- | Prefix increment/prefix decrement | From right to left |
| + − | Add/subtract | ||
| ! ~ | Logical NOT/Bitwise INVERSE | ||
| (type) | Force type conversion | ||
| * | Get the value pointed to by the pointer | ||
| & | The address of something | ||
| sizeof | The size of something | ||
| new,new[] | Dynamic memory allocation/dynamic array memory allocation | ||
| delete,delete[] | Dynamic memory release/dynamic array memory release | ||
| 4 | .* ->* | Member object selection/member pointer selection | From left to right |
| 5 | * / % | Multiplication/Division/Remainder | |
| 6 | + − | Plus/Minus | |
| 7 | << >> | Bit shift left/Bit shift right | |
| 8 | < <= | Less than/Less than or equal to | |
| > >= | Greater than/Greater than or equal to | ||
| 9 | == != | Equal to/Not equal to | |
| 10 | & | Bitwise AND | |
| 11 | ^ | Bitwise XOR | |
| 12 | | | Bitwise OR | |
| 13 | && | AND operation | |
| 14 | || | OR operation | |
| 15 | ?: | Ternary operator | Right to left |
| 16 | = | Assignment | |
| += −= | Addition and assignment | ||
| || | OR operation | ||
| 15 | ?: | Ternary operator | Right to left |
| 16 | |||
| *= /= %= | Multiplication postfix/Division postfix/Remainder postfix | ||
| <<= >>= | Bitwise left shift postfix/Bitwise right shift postfix | ||
| &= ^= |= | Bitwise AND postfix/Bitwise XOR postfix/Bitwise OR postfix | ||
| 17 | throw | Throw out the exception | |
| 18 | , | Comma | From left to right |