How it is calculate?

Question

How it is calculate by compiler #define x 9+2/4*3-2*4+(5-4)*3 x*x*x = ?

Answer 1

In your program, when ever x is present, the compiler just replaces the x with a predefined constant in stack.. Rest evaluation is same as any other expressions.
In this ex:
x*x*x is replaced by
9+2/4*3-2*4+(5-4)*3 * 9+2/4*3-2*4+(5-4)*3 * 9+2/4*3-2*4+(5-4)*3

=42 [if am calculated correctly..]