Question 3: Test of the Transaction class.

Transaction incomplete.

Transaction number: 100
Card holder: Bob Hope
Category: Purchase
Products:
  - Quake 4
  - The Mythical Man-Month
  - Ottawa-Cuba
Amount paid: 1309.97
Points obtained: 13099

Transaction #100, category: 1, card holder: Bob Hope, points: 13099, 
amount paid: 1309.97

Error:  Transaction already completed.
false
Transaction number: 101
Card holder: Grace Hopper
Category: Points redemption
Products:
  - Harry Potter VI
  - Ottawa-Toronto
Points used: 67500
Result: true
Transaction incomplete:  Insufficient points to obtain products.
Transaction incomplete.
Result: false