Why this code work that

Question

I have int a=4 and b=3; so operator "if " (a++ == ++b) say true, ok 4 = 1+3. but why (a++ == 4) false and (++b = 4) false too?

Answer 1

after incrementing "a = 5" and you are assigning "++b" not comparing it

Answer 2

ace thanks