Question regarding ++ in c

Question

I know that in standard C the output of this program is undefined.
because :
If you modify a variable more than one time in a single statement the behavior is undefined according to the C standard.
But I dont know how the output here is 8:

https://code.sololearn.com/c4LjmIywtQKl/#c

Answer 1

If i remember correctly this is not more the standard. The operators used in code have preference well been defined, so you cannot have a double interpretation that causes undefined behavior. Probably this was the standard in first's compilers versions of C language,