> from INDUSTRIAL POINT OF VIEW.. with Problem Description
You have two lifts in a office building and 5 floors to service.

Design a control system which responds to the button presses on each floor and button presses within each lift to achieve optimum performance (least delay for each user).

Enhance this by recording usage statistics to enable the lifts to wait on the most appropriate floors at appropriate times of the day.
For example, at the beginning of the day, most people arrive and therefore waiting nearer the ground floor is a good idea.

U can try a screen recorder program , something like CamStudio(which itself is designed in VC++).
All the best !