Thread: need Help to get this program running

Question:
Write a program that will calculate the cost of a ticket order and display the receipt for the customer on the screen. There are 2 ticket prices: adult, and senior citizen. Adult seats are $4.50 and senior citizen seats are $3.50. If more than 5 senior citizen tickets are purchased, the customer gets an extra 20% off the of the ticket order. If more than 10 regular seats are purchased, the customer gets an additional 10% off the cost of the order. A customer can only place an order for one type of ticket. Output the type of ticket purchased, the number of tickets purchased, the gross cost, the amount of the discount, and the final cost of the order.

I am having errors with incaompatible varriables comparing float with doubles. Can someone please help me solve this program running.
Thanks a lot

public class lab3
{
 
   static Library myLib;
 
   public static void main (String [] args)
  	{
 
         Library myLib          = new Library();                 //Instance the Library class
         int ticketNum;                                          //Number of Tickets
		 char adult;                                             //Ticket Type
		 char senior;
		 char ticketType;
		 final double ADULT_SEAT = 4.50;
		 final double SENIOR_SEAT = 3.50;
		 final double ADULT_DISCOUNT = 0.10;
		 final double SENIOR_DISCOUNT = 0.20;
		 int age;
		 float totalCost;                                        //total cost of the tickets
		 float grossCost;                                        //gross cost without discount
		 float discount;									     //amount of discount
		 int discountRate;
		 discountRate = 0;                                   //Initializing discount rate to 0
 
         /********************   Start main method  *****************/
 
         //Prompt for Ticket Type
         adult = 0;
         senior = 0;
         System.out.println("\n\n");
         System.out.print("Ticket Types, adult or senior   :    ");
         ticketType = Keyboard.readChar();
         if (ticketType == adult || ticketType == senior)
         {
        	System.out.println("Number of Tickets : ");
         	ticketNum = Keyboard.readInt();
		 }
		 else{
		 	System.out.println("You have entered invalid ticket type. Please try again");
 
		 	//clear the screen
            myLib.clrscr();
 
		}
		System.out.println("\n\n");
		//Calc
		if(ticketType == adult && ticketNum >=10)
		{
			totalCost = grossCost - discount;
			grossCost = ADULT_SEAT * ticketNum;
			discount = grossCost * ADULT_DISCOUNT;
		}
		else
			totalCost = ADULT_SEAT * ticketNum;
		if (ticketType == senior && ticketNum >=5)
		{
			totalCost = grossCost - discount;
			grossCost = SENIOR_SEAT * ticketNum;
			discount = grossCost * SENIOR_DISCOUNT;
		}
}
}//end

I tried running it now, but it does not really do any calculation or displays any error message if i enter any char other than adult or senior,
So basically, it is not running anything that it was supposed to be, or is not calculating any calculations.

--- Update ---

This is what I have for my codes

public class lab3
{
 
   static Library myLib;
 
 
 
   public static void main (String [] args)
  	{
 
         Library myLib          = new Library();                 //Instance the Library class
         int ticketNum;                                          //Number of Tickets
		 char adult;                                             //Ticket Type
		 char senior;
		 char ticketType;
		 final float ADULT_SEAT = 4.50f;
		 final float SENIOR_SEAT = 3.50f;
		 final float ADULT_DISCOUNT = 0.10f;
		 final float SENIOR_DISCOUNT = 0.20f;
		 float totalCost;                                        //total cost of the tickets
		 float grossCost;                                        //gross cost without discount
		 float discount;									     //amount of discount
 
         /********************   Start main method  *****************/
 
         //Prompt for Ticket Type
		 ticketType = 0;
		 adult      = 0;
		 senior     = 0;
		 ticketNum  = 0;
         System.out.println("\n\n");
         System.out.print("Ticket Types, adult or senior   :    ");
         if (ticketType == adult || ticketType == senior)
         {
			ticketType = Keyboard.readChar();
        	System.out.println("Number of Tickets : ");
         	ticketNum = Keyboard.readInt();
		 }
		 else{
		 	System.out.println("You have entered invalid ticket type. Please try again");
 
		 	//clear the screen
            myLib.clrscr();
 
		}
		System.out.println("\n\n");
 
		//Calculating Total Cost of Tickets
		totalCost  = 0;
		grossCost  = 0;
		discount   = 0;
 
		if(ticketType == adult && ticketNum >=10)
		{
			totalCost = grossCost - discount;
			grossCost = ADULT_SEAT * ticketNum;
			discount = grossCost * ADULT_DISCOUNT;
		}
		else
			totalCost = ADULT_SEAT * ticketNum;
 
		if (ticketType == senior && ticketNum >=5)
		{
			totalCost = grossCost - discount;
			grossCost = SENIOR_SEAT * ticketNum;
			discount = grossCost * SENIOR_DISCOUNT;
		}
 
		//Output
		         System.out.println("\n\n\n");
				 System.out.println("\t\t\t   Scheemaker Stadium Ticket Receipt ");
				 System.out.println("\t\t\t   ---------------------------------- \n");
				 System.out.println("\t\tTicket Type          :" +ticketType);
				 System.out.println("\t\tNumber of Tickets    :" +ticketNum);
				 System.out.println("\t\tTicket Cost          :" +grossCost);
				 System.out.println("\t\tDiscount Amount      :" +discount);
				 System.out.println("\t\tFinal Cost           :" +totalCost);
 
		 	     System.out.println("\n\n\n\n\n\n\n");
		 	     //pause the screen - this statement is not needed in this program
         //myLib.pause();
}
}//end

When the program prompts me to enter senior or adult, i entered "senior" without quote. And this is what it produce as an output


Error reading int data, MIN_VALUE value returned.







Scheemaker Stadium Ticke
------------------------

Ticket Type :s
Number of Tickets :-2147483648
Ticket Cost :0.0
Discount Amount :0.0
Final Cost :-9.6636764E9
Press any key to continue . . .

When entered "adult", this is what it outputs

Ticket Types, adult or senior : adult
Number of Tickets :
Error reading int data, MIN_VALUE value returned.







Scheemaker Stadium Ticket Receipt
----------------------------------

Ticket Type :a
Number of Tickets :-2147483648
Ticket Cost :0.0
Discount Amount :0.0
Final Cost :-9.6636764E9
Press any key to continue . . .
And it does not even gimme an option to enter number of tickets
When entered invalid ticket type, this is what it output

Ticket Types, adult or senior : saddasadad
Number of Tickets :
Error reading int data, MIN_VALUE value returned.







Scheemaker Stadium Ticket Receipt
----------------------------------

Ticket Type :s
Number of Tickets :-2147483648
Ticket Cost :0.0
Discount Amount :0.0
Final Cost :-9.6636764E9








Press any key to continue . . .


I don't know why its not running

Lab: There are 2 ticket prices: adult, and senior citizen. Adult seats are $4.50 and senior citizen seats are $3.50. If more than 5 senior citizen tickets are purchased, the customer gets an extra 20% off the of the ticket order. If more than 10 regular seats are purchased, the customer gets an additional 10% off the cost of the order. A customer can only place an order for one type of ticket. Output the type of ticket purchased, the number of tickets purchased, the gross cost, the amount of the discount, and the final cost of the order.

Pseudo-code:

INPUTS
Ticket Type Char
Number of Tickets Integer

CONSTANTS
adult = 'a'
senior= 's'
adults seat = $4.50 per ticket
senior seat = $3.50 per ticket

CALCULATION AND PROCESS
Final Cost = Gross Cost - Discount
Gross Cost = adult/senior seat * number of tickets
If senior tickets are purchased 5 or more then they will get 20% discount
If adults tickets are purchased 10 or more then they will receive 10% discount

Discount = gross cost * discount rate
Validate if the ticket type is valid ticket type: senior or adult.
if it is invalid display a error message and prompt them to try again

OUTPUT
Receipt:
Ticket Type :
Number of Ticket:
Gross Cost:
Discount: If applicable
Final Cot




I really need help on this please. Any help is highly appreciated. Thanks a lot.

What have you got down so far?