Write a program that models 2 vehicles (Car and Truck) and will be able to simulate driving and refueling them in the summer. Car and truck both have fuel quantity, fuel consumption in liters per km and can be driven given distance and refueled with given liters. But in the summer both vehicles use air conditioner and their fuel consumption per km is increased by 0.9 liters for the car and with 1.6 liters for the truck. Also the truck has a tiny hole in his tank and when it gets refueled it gets only 95% of given fuel. The car has no problems when refueling and adds all given fuel to its tank. If vehicle cannot travel given distance its fuel does not change.
Exercises: Polymorphism
Problem 1. Vehicles
Write a program that models 2 vehicles (Car and Truck) and will be able to simulate driving and refueling them in
the summer. Car and truck both have fuel quantity, fuel consumption in liters per km and can be driven given
distance and refueled with given liters. But in the summer both vehicles use air conditioner and their fuel
consumption per km is increased by 0.9 liters for the car and with 1.6 liters for the truck. Also the truck has a tiny
hole in his tank and when it gets refueled it gets only 95% of given fuel. The car has no problems when refueling and
adds all given fuel to its tank. If vehicle cannot travel given distance its fuel does not change.
Input
On the first line - information about the car in format {Car {fuel quantity} {liters per km}}
On the second line – info about the truck in format {Truck {fuel quantity} {liters per km}}
On third line - number of commands N that will be given on the next N lines
On the next N lines – commands in format
o Drive Car {distance}
o Drive Truck {distance}
o Refuel Car {liters}
o Refuel Truck {liters}
Output
After each Drive command print whether the Car/Truck was able to travel given distance in format if it’s successful.
Print the distance with two digits after the decimal separator except trailing zeros.
Car/Truck travelled {distance} km
Or if it is not:
Car/Truck needs refueling
Finally print the remaining fuel for both car and truck:
Car: {liters}
Truck: {liters}
Example #1
Input Output
Car 15 0.3
Truck 100 0.9
4
Drive Car 9
Drive Car 30
Refuel Car 50
Drive Truck 10
Car travelled 9 km
Car needs refueling
Truck travelled 10 km
Car: 54.20
Truck: 75.00
Page 2 of 3
Example #2
Input Output
Car 30.4 0.4
Truck 99.34 0.9
5
Drive Car 500
Drive Car 13.5
Refuel Truck 10.300
Drive Truck 56.2
Refuel Car 100.2
Car needs refueling
Car travelled 13.5 km
Truck needs refueling
Car: 113.05
Truck: 109.13
Problem 2. Vehicles Extension (Bonus)
Use your solution of the previous task for starting point and add more functionality. Add new vehicle – Bus. Now
every vehicle has tank capacity and fuel quantity cannot fall below 0 (If fuel quantity become less than 0 print on
the console “Fuel must be a positive number”).
The vehicles cannot be filled with fuel more than their tank capacity. If you try to put more fuel in the tank than
the available space, print on the console “Cannot fit fuel in tank” and do not add any fuel in vehicles tank.
Add new command for the bus. The bus can drive with or without people. If the bus is driving with people, the airconditioner
is turned on and its fuel consumption per kilometer is increased with 1.4 liters. If there are no people
in the bus when driving the air-conditioner is turned off and does not increase the fuel consumption.
Input
On the first three lines you will receive information about the vehicles in format:
Vehicle {initial fuel quantity} {liters per km} {tank capacity}
On fourth line - number of commands N that will be given on the next N lines
On the next N lines – commands in format
o Drive Car {distance}
o Drive Truck {distance}
o Drive Bus {distance}
o DriveEmpty Bus {distance}
o Refuel Car {liters}
o Refuel Truck {liters}
o Refuel Bus {liters}
Output
After each Drive command print whether the Car/Truck was able to travel given distance in format if it’s
successful:
Car/Truck/Bus travelled {distance} km
Or if it is not:
Car/Truck/Bus needs refueling
If given fuel is ≤ 0 print “Fuel must be a positive number”.
If given fuel cannot fit in car or bus tank print “Cannot fit fuel in tank”
Finally print the remaining fuel for car, truck and bus rounded 2 digits after floating point in format:
Car: {liters}
Truck: {liters}
Page 3 of 3
Bus: {liters}
Example
Input Output
Car 30 0.04 70
Truck 100 0.5 300
Bus 40 0.3 150
8
Refuel Car -10
Refuel Truck 0
Refuel Car 10
Refuel Car 300
Drive Bus 10
Refuel Bus 1000
DriveEmpty Bus 100
Refuel Truck 1000
Fuel must be a positive number
Fuel must be a positive number
Cannot fit fuel in tank
Bus travelled 10 km
Cannot fit fuel in tank
Bus needs refueling
Cannot fit fuel in tank
Car: 40.00
Truck: 100.00
Bus: 23.00
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