Adding a parameterized method to Vehicle

Objective:
Add a method to calculate the amount of fuel needed to travel a given distance.

Definition of the fuelneeded( ) Method
Name: fuelneeded
Return Type: double
Parameter: int miles (number of miles to travel)
Description: Calculates the amount of fuel needed to cover the specified distance.

Implementation:

double fuelneeded(int miles) {
    return (double) miles / mpg;
}

Note: The returned value is of type double to deal with fractional fuel values.

Vehicle Class with fuelneeded( ) Method
Fields:
int passengers: Number of passengers.
int fuelcap: Fuel storage capacity in gallons.
int mpg: Fuel consumption in miles per gallon.

Methods:
int range(): Returns the vehicle's range.
double fuelneeded(int miles): Calculates the fuel needed for a given distance.

Code Example:

class Vehicle {
    int passengers; // número de passageiros
    int fuelcap;    // capacidade de armazenamento de combustível em galões
    int mpg;        // consumo de combustível em milhas por galão

    // Retorna a autonomia.
    int range() {
        return mpg * fuelcap;
    }

    // Calcula o combustível necessário para cobrir uma determinada distância.
    double fuelneeded(int miles) {
        return (double) miles / mpg;
    }
}

Usage Example: CompFuel Class
Objective: Demonstrate the use of the fuelneeded( ).
method Code Example:

class CompFuel {
    public static void main(String args[]) {
        Vehicle minivan = new Vehicle();
        Vehicle sportscar = new Vehicle();
        double gallons;
        int dist = 252;

        // Atribui valores a campos de minivan
        minivan.passengers = 7;
        minivan.fuelcap = 16;
        minivan.mpg = 21;

        // Atribui valores a campos de sportscar
        sportscar.passengers = 2;
        sportscar.fuelcap = 14;
        sportscar.mpg = 12;

        gallons = minivan.fuelneeded(dist);
        System.out.println("To go " + dist + " miles minivan needs " + gallons + " gallons of fuel.");

        gallons = sportscar.fuelneeded(dist);
        System.out.println("To go " + dist + " miles sportscar needs " + gallons + " gallons of fuel.");
    }
}

Program Operation

• Creates two Vehicle objects: minivan and sportscar.
• Defines the attributes (number of passengers, fuel capacity, fuel consumption) for each vehicle.
• Calculates the fuel needed to travel 252 miles with both vehicles.
• Displays the amount of fuel required for each vehicle.

This example demonstrates how to use parameterized methods to add specific functionality to a class, in this case calculating the fuel needed for a trip.

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