Operator problems-priority

# Include <stdio. h> int main (INT argc, char * argv []) {unsigned char a = 0xa5; unsigned char B = ~ A> 4 + 1; printf ("% d", B); Return 0 ;}
 

Evaluate the output result.

This question is mainly about the operator priority.

Because> the priority is lower than +, the answer to this question is 250. (because a exists in a 16-bit register, it is not 2 ).

C language operator priority and tips

A total of 15 priorities:

1 () [].->

2! ~ -(Negative sign) ++ -- & (take the variable address) * (type) (force type) sizeof

3 */%

4 +-

5 >><

6 >>=<=

7 =! =

8 &

9 ^

10 |

11 &&

12 |

13? :

14 = + =-= * =/= % = | = ^ = & gt; = <=

15,

Parentheses are the first member. // brackets operator [] () member operator.->

Second for all single object; // All single object operators, such as ++, --, + (positive),-(negative), pointer operation *, & multiplication and division, and addition and subtraction; // This "remainder" refers to the remainder operation, that is, %

Shift 5, relation 6; // shift operator: <>>, relation: ><>=

Equals (and) to the seventh row; // that is, = and! =

Bitwise AND exclusive or bitwise OR; // these operations are bitwise operations: bitwise AND (&) exclusive or (^) bitwise OR (|)

"Three parts of the World" 80 or 90;

Logical or heel; // logical operator: | and &&

12 and 11; // attention sequence: Priority (|) at the bottom of priority (&&)

The condition is higher than the value assignment. // the priority of the Three-object operator is 13 BITs, which is only higher than the value assignment operator and ","

The lowest comma operation level! // The comma operator has the lowest priority.