Why output is 252 instead of 210?

Question

For C++ : What's the logic for 252 here?
https://code.sololearn.com/c2b2fqv6fn71/?ref=app

Answer 1

The compiler (gcc) is resolving 6*6*7 and not 5*6*7:

int i=4,x;
x=++i* ++i* ++i;

Another compiler might do something different. Multiple pre/post operators, in one statement on a variable, land in one sequence point and result in undefined (means: compiler-specific) behavior.

Answer 2

If you still have questions after reading this just ask. Also this website is a great source of info for C++.

http://en.cppreference.com/w/cpp/language/eval_order

Answer 3

Regardless of the output (matching or not), output depends on the compiler; it is unreliable.

[edited]

Answer 4

So we'll have different values for same code of c++ on different compilers.??

Answer 5

@jaya I think no !!