training in this game

Question

can you tell me in which worl isn't this five?
int a=3;
int b=2;
b=a++;
cout << b++;

Answer 1

its answer is 4

Answer 2

but the compiler read the code from right to left so it increment b and then print it

Answer 3

Basically you ignore the b=2. b=a++ is 4, the b++ is done after it prints to the screen. so the answer wouldn't be 5 unless you called b again

Answer 4

okay. I'm going to try to explain this because it took me a LOT of effort to figure this out, and I want to clear this up

so, you have this code, I won't bother explaining the first part, I assume the pre/post increments are what is confusing:

b=a++

the ++ doesn't matter, because when you put the '++' after the identifier, it uses the value of a, then changes it. So b will equal a, then it adds 1 to a.

also, then you have (assuming you meant b++, not ++b):

cout << b++

the postfix with the ++ after means that it outputs the value of b, THEN increments.

in reality, the answer should be 3 if you followed me on this.

I hope this clears up any questions you may still have.

Answer 5

i just rewrite the training from this game without include namespace etc

Answer 6

What value did it return, instead of 5 as you predicted?