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Thread: i can run my program but the math doesnt come otu

  1. #1
    Junior Member
    Join Date
    May 2010
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    Default i can run my program but the math doesnt come otu

    um i dont know how to upload my file so im gona post my project, and i would post the pdf prompt but dono how to post that etiehr XD
    so basically i have a few classes and a main
    here is the main
    /**
     * Title: Car Wash with class
     *
     * Description: This program calculates the cost of a car wash based on level
     * of service, type of vehicle, and number of previous washes
     * This uses methods for calculation and validation
     *
     * @author Michael Newby
     * @version 1.0
     */
     
    import javax.swing.*;
    import java.text.DecimalFormat;
     
    public class CarWashWithClass
    {
        public static void main(String[] args)
        {
            long invoiceNumber;
            String name;
            char serviceType,
                 responseSUV;
            	// responseDetailing;
            int numberOfPrevious;
     
            int numberOfVehicles = 0;
     
            double totalDiscount = 0.0,
                   totalAmountDue = 0.0;
     
            DecimalFormat twodigits = new DecimalFormat("0.00");
     
            CarWash service = null;
     
            invoiceNumber = getInvoiceNumber();
     
            while (invoiceNumber > Long.MIN_VALUE)
            {
                name = getCustomerName();
            	serviceType = getValidType();
                responseSUV = getSUVResponse();
                numberOfPrevious = getPreviousService();
                if (numberOfPrevious == 0) // check for new customer
                {
                	service = new CarWash();
                	service.serviceForNewCustomer(invoiceNumber, name);
                }
                else
                {
                	service = new CarWash(invoiceNumber,name);
                	service.serviceForExistingCustomer(numberOfVehicles);
                }
                service.setSUV(responseSUV); //set whether SUV this has an error i dont know why
     
                JOptionPane.showMessageDialog(null, "Invoice number: " + service.getInvoiceNumber()
                		                       + "\nCustomer name: " + service.getName()
                                               + "\nType of service: " + service.typeOfServiceAsString()
                                               + "\nVehicle type: " + service.vehicleAsString()
                                               + "\nNumber of service: " + service.getnumberOfService()
                                               + "\nBasic cost: " +
                                                       twodigits.format(service.basicCost())
                                               + "\nSUV extra cost: " +
                                                       twodigits.format(service.extraCostForSUV())
                                               + "\nCost of service: " +
                                                       twodigits.format(service.costOfService())
                                               + "\nDiscount: " + twodigits.format(service.discountAmount())
                                               + "\nAmount due: " +
                                                      twodigits.format(service.amountDue())
                                               + "\nServices to next free: " + service.numberTillNextFree());
                numberOfVehicles++;
                totalDiscount += service.discountAmount();
                totalAmountDue += service.amountDue();
     
                invoiceNumber = getInvoiceNumber();
            }//end while
            JOptionPane.showMessageDialog(null, "Number of cars washed: " + numberOfVehicles
                                             + "\nTotal discount: " + twodigits.format(totalDiscount)
                                             + "\nTotal amount: " + twodigits.format(totalAmountDue));
           System.exit(0);
       } //end main
     
       public static long getInvoiceNumber()
       {
           long customerNumber;
           String inNumber;
     
           do
           {
               inNumber = JOptionPane.showInputDialog("Enter invoice number:");
               if (inNumber.equals(""))
                 customerNumber = Long.MIN_VALUE;
              else
              {
                 customerNumber = Long.parseLong(inNumber);
                 if (!isValidNumber(customerNumber))
                     JOptionPane.showMessageDialog(null, "Invoice number must be positive",
                                                   "Invalid Number", JOptionPane.ERROR_MESSAGE);
              } // end if
         } while (!isValidNumber(customerNumber));
         return customerNumber;
       } // end getCustomerNumber
     
       public static boolean isValidNumber(long number)
       {
         return (number > 0 || number == Long.MIN_VALUE);
       } //end isValidNumber
     
       public static String getCustomerName()
       {
    	   String name;
    	   name = JOptionPane.showInputDialog("Customer name");
    	   while (name.isEmpty())
    	   {
    		   name = JOptionPane.showInputDialog("Name cannot be blank..re-enter");
    	   }
    	   return name;	   
       }
     
       public static char getValidType()
       {
         char serviceType;
         String inType;
         do
         {
             inType = JOptionPane.showInputDialog("Type of wash:");
             if (inType.equals(""))
             {
                 serviceType = '\0';
             }
             else
             {
                serviceType = inType.charAt(0);
                serviceType = Character.toUpperCase(serviceType);
                if (!isValidService(serviceType))
                {
                    JOptionPane.showMessageDialog(null, "No such service",
                                                  "Invalid Service", JOptionPane.ERROR_MESSAGE);
                }
            } //end if
         } while (!isValidService(serviceType));
         return serviceType;
       } //end getValidType
     
     
       public static boolean isValidService(char serviceType)
       {
           boolean valid;
           switch (serviceType)
           {
           case 'T' : case 'W': case 'S':
               valid = true;
               break;
           default:
               valid = false;
               break;
           }// end switch
           return valid;
       } //end isValidService
     
       public static int getPreviousService()
       {
           int previousService;
           String inPrevious;
           inPrevious = JOptionPane.showInputDialog("Number of previous services:");
           previousService = Integer.parseInt(inPrevious);
           while (!isValidNumber(previousService))
           {
               JOptionPane.showMessageDialog(null, "Service must be between 0 and " + (CarWash.FREE_WASH - 1),
                                                  "Invalid Number", JOptionPane.ERROR_MESSAGE);
               inPrevious = JOptionPane.showInputDialog("Number of previous services:");
               previousService = Integer.parseInt(inPrevious);
            } //end while
            return previousService;
        }// end getPreviousService
     
        public static boolean isValidNumber(int numberOfService)
        {
            return (numberOfService >= 0 && numberOfService <= CarWash.FREE_WASH - 1);
        } // end isValidNumber
     
        public static char getSUVResponse()
        {
            char response;
            String inSUV;
            inSUV = JOptionPane.showInputDialog("Is vehicle an SUV?");
            response = inSUV.charAt(0);
            response = Character.toUpperCase(response);
            while (!isValidResponse(response))
            {
               JOptionPane.showMessageDialog(null, "Please respons Y or N",
                                                  "Invalid Number", JOptionPane.ERROR_MESSAGE);
               inSUV = JOptionPane.showInputDialog("Is vehicle an SUV?");
               response = inSUV.charAt(0);
               response = Character.toUpperCase(response);
           } //end while
           return response;
       }// end getSUVResponse
     
       public static boolean isValidResponse(char response)
       {
           boolean valid;
           switch (response)
           {
           case 'Y' : case 'N':
               valid = true;
               break;
           default:
               valid = false;
               break;
           }// end switch
           return valid;
       } //end isValidResponse
    } // end class CarWashWithClass
    ----
    here is CarWash the superclass
    public class CarWash
    {
    	final static double THE_WORKS_COST = 11.95;
       	final static double WHEEL_WORKS_COST = 14.95;
        final static double SUPER_WORKS_COST = 17.95;
      	final static double SUV_COST = 3.0;
       	final static int FULL_COST_LIMIT = 5;
       	final static int FREE_WASH = 10;
        final static double DISCOUNT_RATE = 0.05;	
     
    	private long invoiceNumber;
    	private String customerName;
    	protected double basicRate;
    	protected int numberOfService;
    	protected boolean whetherSUV;
     
    	public CarWash()
    	{
    	}
    	//end constructor
     
    	public CarWash(long number, String name)
    	{
    		invoiceNumber = number;
    		customerName = name;
    		basicRate = 0;
    		numberOfService = 0;
    		whetherSUV = false;
    	}
     
    	public void serviceForNewCustomer(long number, String name)
    	{
    		invoiceNumber = number;
    		customerName = name;
    		basicRate = 0;
    		numberOfService = 1;
    		whetherSUV = false;
    	}
     
    	public void serviceForExistingCustomer(int previousServices)
    	{
    		if (previousServices == 10)
    			numberOfService = 1;
    		else
    			numberOfService = previousServices + 1;
    		basicRate = 0;
    		whetherSUV = false;
    	}
     
    	public void setSUV()
    	{
    		whetherSUV = true;
    	}
     
    	public double basicCost()
    	{
    		 return basicRate;
        } // end basicCost
     
     
     
    	public double extraCostForSUV()
    	{
    		 double extraCost;
         		   if (whetherSUV)
                {
                	extraCost = SUV_COST;
                 }
           		else
                {
            		extraCost = 0.0;
                 } //end if
          		return extraCost;
                 }// end extraCostForSUV
     
    	public double costOfService()
    	{
    		return basicCost() + extraCostForSUV();
    	}
     
    	public double discountAmount()
    	{
    		double discount = 0.0;
            return discount;
        } //end discountAmount
     
    	  public double amountDue()
     	   {
         	   return costOfService() - discountAmount();
     	   } //end amountDue
     
    	public int numberTillNextFree()
        {
            int toNextService;
            if (numberOfService == FREE_WASH)
                toNextService = FREE_WASH;
            else
                toNextService = FREE_WASH - (numberOfService + 1);
            return toNextService;
        } //end numberToNextFree
     
        public String typeOfServiceAsString()
        {
        	return " ";
        } // end typeOfService
     
        public String vehicleAsString()
        {
            String outSUV;
            if (whetherSUV)
            {
                outSUV = "SUV";
            }
            else
            {
                outSUV = "Not SUV";
            } //end if
            return outSUV;
        }// end isSUVString
     
    	public long getInvoiceNumber()
        {
            return invoiceNumber;
        } //end getInvoiceNumber
     
    	public String getName()
        {
        	return customerName;
        }
        public double getRate()
        {
            return basicRate;
        } //end getServiceType
     
        public boolean isSUV()
        {
            return whetherSUV;
        } // end isVehicleSUV
     
        public int getnumberOfService()
        {
            return numberOfService;
        } // end getPreviousServices
    } // end class CarWash

    ---

    here is WheelWorks subclass
    public class WheelWorks extends CarWash
    {
    	public WheelWorks()
    	{
     
    	}//end constructor
     
    	public WheelWorks(long number, String name)
    	{
    		super(number, name);
    		basicRate = WHEEL_WORKS_COST;
    		numberOfService = 0;
    		whetherSUV = false;
    	}
     
    	public void serviceForNewCustomer(long number, String name)
    	{
    		super.serviceForNewCustomer(number, name);
    		basicRate = WHEEL_WORKS_COST;
    		numberOfService = 1;
    		whetherSUV = false;
    	}
     
    	public void serviceForExistingCustomer(long number, String name)
    	{
    		int previousServices = 0;
    		if (previousServices >= 0 && previousServices<=9)
    			basicRate = WHEEL_WORKS_COST;
     
    		else if (previousServices == 10)
    			numberOfService = previousServices + 1;
    			whetherSUV = false;
    	}
     
    	public double discountAmount()
    	{
    		double discount;
    	    if (numberOfService < FREE_WASH)
    		  discount = DISCOUNT_RATE * costOfService(); //applies discount if number of serivce < 10
    	    else if (numberOfService <= FULL_COST_LIMIT)
            {
                discount = 0.0;
            }//discount is 0 if number of service < 5
    	    else
            { 
                discount = costOfService();
            } //end if
            return discount;
        } //end discountAmount
     
    	public String typeOfVehicleAsString()
    	{
    		return "Wheel Works";
    	}
     
     
    }
    -----
    superworks
    public class SuperWorks extends CarWash
    {
    	protected boolean detailing;
     
    	public SuperWorks()
    	{
     
    	}
     
    	public SuperWorks(long number, String name)
    	{
    		super(number, name);
    		basicRate = SUPER_WORKS_COST;
    		numberOfService = 0;
    		whetherSUV = false;
     
    	}
     
    	public void serviceForNewCustomer(long number, String name)
    	{
    		super.serviceForNewCustomer(number, name);
    		basicRate = SUPER_WORKS_COST;
    		numberOfService = 0;
    		whetherSUV = false;
    		detailing = false;
    	}
     
    	public void serviceForExistingCustomer(long number, String name)
    	{
    		int previousServices = 0;
    		if (previousServices >= 0 && previousServices<=9)
    			basicRate = SUPER_WORKS_COST;
     
    		else if (previousServices == 10)
    			numberOfService = 0;
    			whetherSUV = false;
    			detailing = false;
    				}
     
    	public double discountAmount()
    	{
    		double discount;
            discount = 0.0;
            return discount;
        } //end discountAmount
     
    	public String typeOfVehicleAsString()
    	{
    		return "Super Works";
    	}
     
    	public int numberTillNextFree()
    	{
    		 return 9999;
    	     //end numberToNextFree
    	}
     
    	public void setDetailing()
    	{
    			detailing = true;
    	}
     
    	public double detailingCost()
    	{
    		double cost;
    		if (detailing = true)
    			cost = 10.00;
    		else
    			cost = 0.0;
    		return cost;
    	}
     
    	public double costOfService()
    	{
    		return basicCost() + extraCostForSUV() + detailingCost();
    	}
    }
    -----
    Theworks
    public class TheWorks extends CarWash
    {
    	public TheWorks()
    	{
     
    	}//end constructor
     
    	public TheWorks(long number,String name)
    	{
    		super(number, name);
    		basicRate = THE_WORKS_COST;
    		numberOfService = 0;
    		whetherSUV = false;
    	}
     
    	public void serviceForNewCustomer(long number, String name)
    	{
    		super.serviceForNewCustomer(number, name);
    		basicRate = THE_WORKS_COST;
    		numberOfService = 1;
    		whetherSUV = false;
    	}
     
    	public void serviceForExistingCustomer(long number, String name)
    	{
    			int previousServices = 0;
    		if (previousServices >= 0 && previousServices<=9)
    			basicRate = THE_WORKS_COST;
     
    		else if (previousServices == 10)
    			numberOfService = previousServices + 1;
    			whetherSUV = false;
    	}
    	public double discountAmount()
    	{
    		double discount;
    		  if (numberOfService < FREE_WASH)
    			  discount = DISCOUNT_RATE * costOfService(); //applies discount if number of serivce < 10
    		  else if (numberOfService <= FULL_COST_LIMIT)
    	        {
    	            discount = 0.0;
    	        }//discount is 0 if number of service < 5
    		  else
    	        { 
    	            discount = costOfService();
    	        } //end if
    	        return discount;
    	    } //end discountAmount
     
    	public String typeOfVehicleAsString()
    	{
    		return "The Works";
        } // end typeOfService
     
     
     
     
    }
    --

    this project involves using inheritance and polymorphism and i know i did alot of things wrong

    for one this is our 3rd project, but uses the same question from project 2 and project 1 but by doing it in different ways, the project 2 was using classes and objects i think, this one i have to use polymorphism

    anyways i copied and pasted his MAIN of PROJECT 2 into PROJECT 3, i checked the prompt and it is pretty correct i blieve

    however in the line of the main service.setsuv(responsesuv) it says i have an error because its changing it to a CHAR


    also the discount and basic rate come out as 0, i can run the project when i add the parameter Char responsesuv to the superclass but i dont think that is the correct way
    Last edited by helloworld922; May 7th, 2010 at 09:57 PM.


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