If b=a++?

Question

umm whats the answer of
cout<<++b<<endl;

Answer 1

a+1

Answer 2

Isn't it a+2? b=a++ is interpreted b = a+1 and ++b= a+1+1=a+2. I didn't have a single doubt about these things, until now...

Answer 3

a++ only gets increment after it encounters a semicolon unlike ++a, which happens on spot..so initially b=a, then ++b makes it a+1

Answer 4

a+1
1