UNICEF has long had a program in which they collect loose change from airline passengers as they are leaving one country and flying to another.  The money goes to UNICEF's many charitable programs.  The organization has decided to follow this program with the installation of computerized money exchanges in many international airports.  The idea is that an arriving passenger can get money exchanged at a very low fee and is given an opportunity to contribute the coin part of the exchange to UNICEF's programs.  The machines will be labeled, UNICEF Cambio Inc.

You have been commissioned to write the program to control the computerized money exchanges.  The machines each have a big red button labeled "Start", a screen to see program output, and a keyboard to enter information.  When a passenger presses "Start", your program will run; it needs to do the following things.
 

1. Greet the passenger, explain what the machine does, and ask him/her what currency s/he wants to exchange (ask for a single word currency name).

 
2. Read the passenger's entry and match it against one of the allowed currencies.  In this trial installation, only six currencies are allowed:  the euro (1 euro = $1.30912), the British pound (1 pound = $1.95193), the Swiss franc (1 franc = $0.81885), the Russian rouble (1 rouble = $0.03789), the Japanese yen (1 yen = $0.008475) and the South Korean won (1 won = $0.001091).  The only currency the machine can dispense is US dollars. The passenger's entry is only one word, one of the highlighted six words above.

 
3. If the passenger makes a mistake and enters something that is not one of the six currency names, your program should explain the problem and ask the passenger to re-enter a currency name.  If the passenger gets the name wrong a second time, the program should terminate.

 
4. Once the program has a valid currency name, it should ask the passenger how much of that currency s/he wants to exchange.  The program should then calculate the equivalent in US dollars and tell the passenger how much this is.  If the dollar amount is greater than $500, the program must reject the passenger's money (give it back) because there is a transaction limit of $500.  The program should terminate after telling the passenger what is wrong.

 
5. If the dollar amount is valid, ask the passenger if s/he is willing to donate the fraction of a dollar to UNICEF.  If the passenger agrees, deduct the fraction of a dollar from the amount to be given to the passenger.

 
6. Regardless of whether the donation is made to UNICEF, the program must then deduct the exchange fee ($2 per $100 or part there of being exchanged - original value).  The program should then explain the fee deduction and tell the passenger what s/he will net in the exchange.

 
7. Finally, the program should ask the passenger if s/he wants to make another exchange transaction.  If the passenger indicates that s/he wants another, the program should begin again at the greeting.  If the passenger is finished, the program should end.

Here is a sample transaction with minimal explanation.  (I kept it minimal so that you could choose the output explanations for yourself.)  The passenger's entries are in bold.

What currency do you have? yen
How much do you want to exchange? 1200
Your currency is worth $ 10.17
Would you like to give the part less than $1 to UNICEF (y/n)? y
Your fee is $2.00
Your net from this exchange is $  8.00
Do you want to make another exchange (y/n)?

Approximately three days before this project is due, I will post on WebCT the combination of transactions that I want you to test your program with.  Hand in a well documented printout of your program and a printout of the captured output from the transactions that I specify.  Also, copy the .cpp file containing your program to the handin folder on the P: drive under the COSC 110 folder for your section.  Be sure to name the .cpp file after yourself (I might name mine  wolfep3.cpp )  so that multiple students do not try to submit a file named   p3.cpp  or something similar.