[embedded C foundation] Part 4: use of operators

1 Arithmetic operator

+   -   *   /
% : Cannot operate on floating point numbers , You can only operate on integer numbers 

The result is an integer 6

1.1 i++ and ++i

++:
i++ First use and then add , Don't wait for the statement to complete before adding ( That is, you don't have to wait for the line “;” add )
++i Add it first and then

–:
And ++ equally

1、i++ It can't be left , and ++i Sure .
2、 Remember a little ,++i stay i Directly added to the memory where it is located , Directly change the value of memory . and i++ Will apply for the same memory space to store i++, Wait for it to run out i in the future ,