I ++ and ++ I

1. Write and judge whether the four expressions of ABCD are correct. If yes, write the value of A in the expression (3 points)
   Int A = 4;
   (A) A ++ = (a ++); (B) a ++ = (++ A); (c) (a ++) ++ = A; (d) (++ A) ++ = (a ++ );
   A =?
   A: C error. The left side is not a valid variable and cannot be assigned a value. You can change it to (++ A) + =;
   After the change, the answers are 9, 10, 10, and 11 in sequence.

 

Analysis:

A: It is equivalent to executing a + = A; A ++;

B: It is equivalent to executing a ++; A ++ =;

C: After modification, it is equivalent to executing ++ A; A ++ =;

Same as B

D: equivalent to execution ++ A; A ++ =;
A ++;

 

Summary rules: ++ A has the highest priority and is the first to execute

The second is to execute common operations.

A ++ has the lowest priority and is finally executed.