Assignment or increment operator in c++

Question

I have been running this code at different compilers. At Microsft VS. it prints 1, but at gcc, it prints 0. What is the result according to the standard c++. I don't if there is standardization for this piece of code as well.

int a=0;
a=a++;
cout << a<< endl;

This will answer your question: https://stackoverflow.com/questions/4176328/undefined-behavior-and-sequence-points — Anon Mail, Jun 09 '17 at 13:48

score 2 · Answer 1 · answered Jun 09 '17 at 13:49

a=a++ is undefined behavior. Not only is there no standard definition for what will happen, it isn't even guaranteed to always do the same thing between different runs.

It could print 0 now, 1 the next time, and crash your program on the third attempt.

Assignment or increment operator in c++

1 Answers1