Whats is the reason of ++b no apply the sum ?

Question

int a = 3;
int b =40;
b=a++;
consolewrite(++b);
answer is 4 but in the console are ++ most be 5 im confused.

Answer 1

b=a++ means first assignment of a on b is done and then increment of a
so b becomes 3 and a becomes 4 afterwards
And in output ++b so.. increment first and then output
So the answer is 4