C language operator priority formula

Vinegar jar sour filling  
The taste falls and the blessing beans jump  

common 44 Operators  

vinegar － Elementary ,4 individual ： ( ) [ ] -> Point to structural members . Structural members  
The altar － Monocular ,9 individual ： ! ~ ++ -- - Minus sign ( type )   * The pointer & Address fetch sizeof length （ Combination direction ： From right to left ）
acid － The arithmetic ,5 individual ： * / % + - reduce  
taste － Displacement ,2 individual ： << >> 
irrigation － Relationship ,6 individual ： < <= > >= == be equal to  != It's not equal to  
taste － Bit logic ,3 individual ： & Bitwise AND  ^ Bitwise XOR | Press bit or  
fall － Logic ,2 individual ： && Logic and || Logic or  
jump － Conditions ,1 individual , Three orders ： ? :                                                               （ Combination direction ： From right to left ）
blessing － assignment ,11 individual ： = += -= *= /= %= >>= <<= &= ^= |=                       （ Combination direction ： From right to left ）
bean － comma ,1 individual ： , 
There are only three types of combinations from right to left ： assignment 、 Monocular and trinocular , The others are from left to right .

Be careful ： I wrote the program today The priority of relational operation symbols and bit logic is reversed . Try to use parentheses , There's no problem .
Such as ：if（P1OUT&BIT0==0）P1OUT ^=BIT0;         // Judge p1.0 Whether the output is 0, Yes, just flip , On LED.
This line of program is wrong . You can put parentheses around , namely if（（P1OUT&BIT0）==0）, Or directly ：P1OUT|=BIT0;

The operator with the highest priority is not really an operator , They are a special kind of operation .() It's about functions ,[] Array related , and －> And . It's structural members .
The second is the unary operator , All unary operators have the same priority , So in my opinion In real operators, they have the highest priority , And because they are Combined from right to left , therefore *p++ And *(p++) There is no doubt about equivalence .
Next comes the arithmetic operator ,*、/、% Of course, the priority is higher than +、－ High .
The shift operator follows .
In the next relational operator ,< <= > >= than == != A higher level , It's not easy to understand .
All logical operators have different priorities （ Monocular operators go out ,！ and ~）
Of logical bitwise operators " And " Than " or " high , and " Exclusive or " Between them .
Followed by && Than || high .
Next is the conditional operator , Assignment operator and comma operator .

stay C In language , Only 4 An operator specifies the direction of the operation , They are &&、| |、 Condition operator and assignment operator .
&&、| | We all calculate the value of the expression on the left first , When the value of the left expression can determine the value of the whole expression , The value of the expression on the right is no longer evaluated . Such as a = 0 && b; && The left bit of the operator 0, Then the expression on the right b No longer judge .
In the conditional operator . Such as a?b:c; First judge a Value , According to a The value of is right b or c One of them is evaluated .
The assignment expression specifies that the expression on the right is evaluated first , So make a = b = c = 6; Make it possible .