Why am I not getting correct result when I calculate exponent with ^ in C++?

Question

I am using Bode\'s formuala to calculate distance of nth planet from sun

dist = (4 + 3*(2^(n-2)))/10

If I calculate the distance this way,

Answer 1

Because ^ is not the power operator in C++. You can use std::pow but with double or you can do a lot of casting to make it work with int.