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Thread: HotelOccupancy

  1. #1
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    Default HotelOccupancy

    I'm having trouble with the mathematical parts of my code and I can't seem to spot the problem(s). I've messed around but it becomes worse. Here's my code:

    package chapter5;
     
    // Imports Scanner class of utility package.
    import java.util.Scanner;
     
    // HotelOccupancy class.
    public class HotelOccupancy 
    {
    	// Main function.
    	public static void main(String[] args) 
    	{
    		// Variable declarations.
    		int floors, rooms, occupiedRooms, vacantRooms;		// Integer variables for floors, rooms, occupiedRooms & vacantRooms.
    		int totalRooms = 0;									// Set the totalRooms to zero.
    		int totalOccupiedRooms = 0;							// Set the totalOccupiedRooms to zero.
    		int totalVacantRooms = 0;							// Set the totalVacantRooms to zero.
    		double occupancyRate;								// Double variable for occupancyRate.
     
    		// Create scanner object for input.
    		Scanner keyboard = new Scanner(System.in);
     
    		// Ask the user for the number of floors.
    		System.out.print("How Many Floors in the Hotel?: ");
    		floors = keyboard.nextInt();
     
    		// Check conditions.
    		while (floors < 1) 
    		{
    			System.out.print("Invalid. Enter 1 or more: ");
    			floors = keyboard.nextInt();
    		}
     
    		if (floors >= 1)
    		{
    			for (int i = 1; i <= floors; i++)
    			{
    				// Ask the user for the number of rooms on the floor.
    				System.out.print("Enter the Number of Rooms On the Floor: " + i + ": ");
    				rooms = keyboard.nextInt();
     
    				while (rooms < 10)
    				{
    					System.out.print("Invalid. Enter 10 or more: ");
    					rooms = keyboard.nextInt();
    					totalRooms += rooms;
    				}
     
    				if (rooms >= floors)
    				{
    					// Ask the user for the number of occupied rooms.
    					System.out.print("Enter the Number of Rooms Occupied: ");
    					occupiedRooms = keyboard.nextInt();
    					vacantRooms = (rooms - occupiedRooms);
     
    					totalRooms += rooms;					// Sum of the totalRooms.
    					totalOccupiedRooms += occupiedRooms;	// Sum of the occupiedRooms.
    					totalVacantRooms += vacantRooms;		// Sum of the vacantRooms.
    				}
     
    				else
    					// Else display invalid error message.
    					System.out.println("Invalid Number for Rooms.");
    			}
     
    			// Display the total number of totalRooms.
    			System.out.println("\n Total Rooms in the Hotel Are: " + totalRooms);
     
    			// Display the number of totalOccupiedRooms.
    			System.out.println("\n Total Occupied Rooms in the Hotel Are: " + totalOccupiedRooms);
     
    			// Display the number of totalVacantRooms.
    			System.out.println("\n Total Vacant Rooms in the Hotel Are: " + totalVacantRooms);
     
    			// Calculate the occupancyRate using the modulus.
    			occupancyRate = (totalOccupiedRooms % totalRooms);
     
    			// Display the occupancyRate.
    			System.out.println("\n The Hotel Occupancy Rate is: " + occupancyRate);
    		}
     
    		else
    			// Else display invalid error message.
    			System.out.print("Invalid Number for the Floor.");
     
    		// Close the keyboard object.
    		keyboard.close();
    	}
     
    }

    And this is the output my professor is expecting:

    How many floors does the hotel have? 0
      Invalid. Enter 1 or more:2
      How many rooms does floor 1 have? 3
      Invalid. Enter 10 or more:10
      How many occupied rooms does floor 1 have? 3
      How many rooms does floor 2 have? 10
      How many occupied rooms does floor 2 have? 7
     
      Number of rooms: 20
      Occupied rooms: 10
      Vacant rooms: 10
      Occupancy rate: 0.5

    Thanks for any help/tips.

  2. #2
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    Default

    totalRooms is getting increased multiple times per floor in your code. An infinite amount of times if the user repeatedly inputs less than 10 rooms.

  3. #3
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    Default

    Also, rethink your formula for occupancy rate.

  4. #4
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    Default Re: HotelOccupancy

    Okay, I got rid of
     totalRooms += rooms
    in the first while loop. And I changed the
    occupancyRate = (totalOccupiedRooms % totalRooms);
    to
    occupancyRate = ((double)totalOccupiedRooms / totalRooms);
    . And I am now getting the output he was looking for. Thank you for the tip Ozicron.