- Design the object model for a currency conversion library. Assume you're working for a bank which allows its clients to deposit money into their USD account. Customers have cash in different currencies and want to know the amount in USD which will be added to their account. You want to create a library for a widget which calculates the resulting amount in USD.
UI looks like this:
[Currency name] [Amount] [Currency name] [Amount] [+] … [Resulting amount in USD]