Question

Using a Java.

2. Write a Java program calculate_fare.java to take the input for number of miles, and the class of journey (1,2, or 3, for first, second, and third class respectively), for a train journey.

The program should then calculate and display the fare of journey based on the following criteria:
Note: Use Switch...case and if...else construct

	First (1) Class	Second (1) Class	Third (3) Class
First 100 mile	$ 3 per mile	$ 2 per mile	$ 1.50 per mile
Next 150 mile	$ 2.50 per mile	$ 1.50 per mile	$ 1 per mile
Remaining	$ 2 per mile	$ 1 per mile	$ 0.50 per mile

Rubric:
- Input, usage of appropriate data types - 2 points
- Appropriate usage of if...else in each case of switch construct for each class of journey : 4 points
- Documentation and appropriate variable names- 2 points

The layout of  switch case should be as follows:

switch(cls)//class

{

     case 1: if construct for calculating fare for class 1

     case 2: if construct for calculating fare for class 2

     case 3: if construct for calculating fare for class 3

     default: Display it is an invalid class

}

Answer 1

If you have any doubts, please give me comment...

import java.util.Scanner;

public class calculate_fare {

    public static void main(String[] args) {

        Scanner scnr = new Scanner(System.in);

        System.out.print("Enter number of miles: ");

        int miles = scnr.nextInt();

        System.out.print("Enter class of journey: ");

        int cls = scnr.nextInt();

        double fare = 0.0;

        switch (cls) {

        case 1:

            // for first 100 miles

            if (miles <= 100)

                fare = miles * 3.00;

            else {

                fare = 100 * 3.00;

                // next 150 miles

                if ((miles - 100) <= 150)

                    fare += (miles - 100) * 2.50;

                else {

                    fare += 150 * 2.50;

                    // remaining

                    fare += (miles - 250) * 2.00;

                }

            }

            System.out.println("Total fare is: " + fare);

            break;

        case 2:

            // for first 100 miles

            if (miles <= 100)

                fare = miles * 2.00;

            else {

                fare = 100 * 2.00;

                // next 150 miles

                if ((miles - 100) <= 150)

                    fare += (miles - 100) * 1.50;

                else {

                    fare += 150 * 1.50;

                    // remaining

                    fare += (miles - 250) * 1.00;

                }

            }

            System.out.println("Total fare is: " + fare);

            break;

        case 3:

            // for first 100 miles

            if (miles <= 100)

                fare = miles * 1.50;

            else {

                fare = 100 * 1.50;

                // next 150 miles

                if ((miles - 100) <= 150)

                    fare += (miles - 100) * 1.00;

                else {

                    fare += 150 * 1.00;

                    // remaining

                    fare += (miles - 250) * 0.50;

                }

            }

            System.out.println("Total fare is: " + fare);

            break;

        default:

            System.out.println("Invalid class");

        }

    }

}