how to use a refined number in erlang?

Question

How i can use my refined number as shown below :

1> game:num().
provide a number between 1 and 100 : 10.              
10 is not my number. It is greater than 10.
provide a number between 11 and 100 : 44.
44 is not my number. It is lesser than 44.
provide a number between 1 and 43 : 

Once you've refined the lower/upper bound, you have to use that. So the last message should be:

"provide a number between 11 and 43".

Answer 1

你只需要跟踪两个边界（上下）以达到你想要的效果。但是，我没有提供代码。