Calculator-V
The Curta calculator was developed in 1948 and, although costly, became popular for its portability. This purely mechanical hand-held device could do addition, subtraction, multiplication and division. By the early 1970s electronic pocket calculators ended manufacture of mechanical calculators, although the Curta remains a popular collectable item. Find more on wikipedia page...
In this series of missions you are going to build an elementary calculator.
As an input, you get a sequence of keys pressed, and, as the result of that function, you should show what will be shown on the screen when the last key is pressed....
You should be an authorized user in order to see the full description and start solving this mission.
