1, operator precedence and associativity

++and-operators have higher priority than+and-,and they are all combinations of pairs.

2. Before++and after++operators

Before++,that is ++a, the result of the expression is the increased value of A..

Postposition++means a++, and the result of the expression is the value before A is increased.

Title: A-B++C++

1, first put parentheses according to priority.

(a - )-(b++)+(c++)

2, the brackets are calculated first, and they are all postposition++operators, and the results are all the results before self-increment.

2-2+2

3. The final result is 2.

4. At the same time, A passes-,B and C both pass++,a= 1, b=3, c=3.

5. The code above is disassembled.

a-b+ c；

a-；

b++；

c++；