Enter fuel efficiency (enter 0 to quit): 
Enter amount of fuel (enter 0 to create a new car): 
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 100.0
   Current fuelLevel = 1.0
   Current odometer = 100.0
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 25.0
   Current fuelLevel = 0.0
   Current odometer = 125.0
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 0.0
   Current fuelLevel = 0.0
   Current odometer = 125.0
Enter distance to travel (enter 0 to add more fuel): 
Enter amount of fuel (enter 0 to create a new car): 
Enter distance to travel (enter 0 to add more fuel): 
Enter amount of fuel (enter 0 to create a new car): 
Enter fuel efficiency (enter 0 to quit): 
Enter amount of fuel (enter 0 to create a new car): 
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 4.5
   Current fuelLevel = 6.0
   Current odometer = 4.5
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 1.5
   Current fuelLevel = 5.0
   Current odometer = 6.0
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 1.0
   Current fuelLevel = 4.333333333333333
   Current odometer = 7.0
Enter distance to travel (enter 0 to add more fuel): 
   Distance actually traveled = 6.5
   Current fuelLevel = 0.0
   Current odometer = 13.5
Enter distance to travel (enter 0 to add more fuel): 
Enter amount of fuel (enter 0 to create a new car): 
Enter fuel efficiency (enter 0 to quit): 
