Question

• Write a program for Bob’s Bus Company that allows a user check on ticket prices following the guidelines below:

                     Zones Crossed
             ---------------------------
Passengers     0      1      2      3
----------------------------------------
1             7.50  10.00  12.00  12.75
2            14.00  18.50  22.00  23.00
3            20.00  21.00  32.00  33.00
4            25.00  27.50  36.00  37.00

• The user enters ticket data (number of passengers and number of zones crossed) continuously until a sentinel value, -1 for passengers, is entered. When -1 is entered for number of passengers, there is no prompt for number of zones.
• After each set of ticket data is entered, display the price or the ticket(s).

Sample Run #1 (bold, underlined text is what the user types):

Passengers? 2

Zones? 3

$23
Passengers? 4

Zones? 0

$25
Passengers? -1

Done

c++

Answer 1

Program: In this program, we take user inputs from the user for the number of passengers and zones and depending on that we display the price of the ticket(s) usiing the information. We have implemented it in two ways:

1)Using switch case: For every passenger value we check the value of zones and print the price accordingly.

2)Using a 2D array: In this we store the prices in a 2D array and using the passenger and zones value as indices we access the ticket price.

Implementation using switch case:

Code:

#include <iostream>

using namespace std;

int main() {

    //Create variables
    int zones, passengers;

    //Take Inputs
    cout << "Passengers? ";
    cin >> passengers;

    //Run a loop while passengers is not equal to -1
    while (passengers != -1) {
        cout << "Zones? ";
        cin >> zones;

        //Make switch case for passengers
        switch (passengers) {
            case 1: {
                if (zones == 0) {
                    cout << "$7.5" << endl;
                } else if (zones == 1) {
                    cout << "$10" << endl;
                } else if (zones == 2) {
                    cout << "$12" << endl;
                } else if (zones == 3) {
                    cout << "$12.75" << endl;
                }
                break;
            }
            case 2: {
                if (zones == 0) {
                    cout << "$14" << endl;
                } else if (zones == 1) {
                    cout << "$18.5" << endl;
                } else if (zones == 2) {
                    cout << "$22" << endl;
                } else if (zones == 3) {
                    cout << "$23" << endl;
                }
                break;
            }
            case 3 : {
                if (zones == 0) {
                    cout << "$20" << endl;
                } else if (zones == 1) {
                    cout << "$21" << endl;
                } else if (zones == 2) {
                    cout << "$32" << endl;
                } else if (zones == 3) {
                    cout << "$33" << endl;
                }
                break;
            }
            case 4: {
                if (zones == 0) {
                    cout << "$25" << endl;
                } else if (zones == 1) {
                    cout << "$27.5" << endl;
                } else if (zones == 2) {
                    cout << "$36" << endl;
                } else if (zones == 3) {
                    cout << "$37" << endl;
                }
                break;
            }

            default: {
                cout << "Invalid option." << endl;
                break;
            }

        }
        cout << "Passengers? ";
        cin >> passengers;
    }

    cout << "Done" << endl;
    return 0;

}

Output:

Implementation using a 2D array:

Code:

#include <iostream>

using namespace std;

int main() {
    //Store the price of the tickets in a 2D array
    double price[4][4] = {{7.50,  10.00, 12.00, 12.75},
                          {14.00, 18.50, 22.00, 23.00},
                          {20.00, 21.00, 32.00, 33.00},
                          {25.00, 27.50, 36.00, 37.00}};

    //Create variables
    int zones, passengers;

    //Take Inputs
    cout << "Passengers? ";
    cin >> passengers;

    //Run a loop while passengers is not equal to -1
    while (passengers != -1) {
        cout << "Zones? ";
        cin >> zones;

        //Print for each entry, reduce in the passenger variable by 1 to match array index
        cout << "$" << price[passengers - 1][zones] << endl;
        cout << "Passengers? ";
        cin >> passengers;
    }

    cout << "Done" << endl;
    return 0;
}

Output:

#Please ask for any kind of doubts!. Thanks.