更改未初始化的计算器变量

Question

好吧所以我正在尝试制作一个更改计算器，我收到一些错误代码告诉我我的变量没有初始化，不确定如何修复它。

谢谢，如果需要，我会提供更多详细信息。

基本上，它现在正在做的就是用税收来计算产品的成本，然后为可以支付的不同面额的货币获取投入。 “100”是您可以键入以停止使用新面额的数字。感谢。

  //**********************************************************
  // Assignment: Operations on numbers 12 & 9
  //
  // Description: This finds the sum, difference, product, and quotient (With remainder) of 12 and 9
  //
  // Author: Rowen Paredes-Morris
  //
  // Date Start: 18/02/2016
  // Date Completed: 18/02/2016
  //
  // Completion time: 20 minutes
  //
  // Honor Code: I pledge that this program represents my own
  //   program code. I received help from Mr. Bozz
  //*********************************************************

  //  A program to add two numbers.

  import java.util.Scanner;

  public class ChangeCalculator
  {
     public static void main (String[] args)
     {

      // Step 1 - Declaring variables
        Scanner input = new Scanner(System.in);
        int loonie;
        int toonie;
        int quarter;
        int dime;
        int nickel;
        int penny;
        double change;
        double priceNoTax;
        double priceWithTax;
        int firstDenomination;
        int secondDenomination;
        int thirdDenomination;
        int fourthDenomination;
        int fifthDenomination;
        int moneyInserted;

      // Step 2 - (Input) Assigning values to variables

        System.out.print("What is the price of your purchase before tax?");
        priceNoTax = input.nextDouble();
        priceWithTax = priceNoTax*1.13;
        System.out.print("The price with tax is $"+priceWithTax);

        System.out.print("\n\nWhat is the first denomination you will you be paying with? (1, 2, 5, 10, 20, 50");

        firstDenomination = input.nextInt();

        while (firstDenomination != 1 && firstDenomination != 2 && firstDenomination != 5 && firstDenomination != 10 && firstDenomination != 20 && firstDenomination != 50 && firstDenomination != 100)
        {
           System.out.print("Please enter a valid denomination");
           firstDenomination = input.nextInt();
        }

        System.out.print("If you are paying with another denomination, type it in. If not, type \"100\"");

        secondDenomination = input.nextInt();
        while (secondDenomination == firstDenomination || secondDenomination != 1 && secondDenomination != 2 && secondDenomination != 5 && secondDenomination != 10 && secondDenomination != 20 && secondDenomination != 50 && secondDenomination !=100)
        {
           System.out.print("Please enter a new or valid denomination");
           secondDenomination = input.nextInt();
        }

        if (secondDenomination != 100 )
        {
           System.out.print("Your second denomination is $"+secondDenomination);
           System.out.print("\n\nIf you are paying with another denomination, type it in. If not, type \"100\"");
           thirdDenomination = input.nextInt();

           while (thirdDenomination == firstDenomination || thirdDenomination == secondDenomination || thirdDenomination != 1 && thirdDenomination != 2 && thirdDenomination != 5 && thirdDenomination != 10 && thirdDenomination != 20 && thirdDenomination != 50 && thirdDenomination !=100)
           {
              System.out.print("Please enter a new or valid denomination");
              thirdDenomination = input.nextInt();
           }

           if (thirdDenomination != 100)
           {
              System.out.print("If you are paying with another denomination, type it in. If not, type \"100\"");
              fourthDenomination = input.nextInt();

              while (fourthDenomination == firstDenomination || fourthDenomination == secondDenomination || fourthDenomination == thirdDenomination || fourthDenomination != 1 && fourthDenomination != 2 && fourthDenomination != 5 && fourthDenomination != 10 && fourthDenomination != 20 && fourthDenomination != 50 && fourthDenomination !=100)
              {
                 System.out.print("Please enter a new or valid denomination");
                 fourthDenomination = input.nextInt();
              }

              if (fourthDenomination != 100)
              {
                 System.out.print("If you are paying with another denomination, type it in. If not, type \"100\"");
                 fifthDenomination = input.nextInt();

                 while (fifthDenomination == firstDenomination || fifthDenomination == secondDenomination || fifthDenomination == thirdDenomination || fifthDenomination == fourthDenomination || fifthDenomination != 1 && fifthDenomination != 2 && fifthDenomination != 5 && fifthDenomination != 10 && fifthDenomination != 20 && fifthDenomination != 50 && fifthDenomination !=100)
                 {
                    System.out.print("Please enter a new or valid denomination");
                    fifthDenomination = input.nextInt();
                 }        
              }
           }
        }

        if (fifthDenomination != 100)
        {
           System.out.print("First denomination:   $"+firstDenomination);
           if (secondDenomination != 100)
           {
              System.out.print("\nSecond denomination:  $"+secondDenomination);

              if (thirdDenomination !=100)
              {
                 System.out.print("\nThird denomination:   $"+thirdDenomination);

                 if (fourthDenomination !=100)
                 {         
                    System.out.print("\nFourth denomination:  $"+fourthDenomination);

                    if(fifthDenomination !=100)
                    {
                       System.out.print("\nFifth denomination:   $"+fifthDenomination);
                    }
                 }
              }
           }
        }



        }   
     }

错误：

      ChangeCalculator.java:107: variable fifthDenomination might not have been initialized
       if (fifthDenomination != 100)
           ^
 ChangeCalculator.java:114: variable thirdDenomination might not have been initialized
             if (thirdDenomination !=100)
                 ^
 ChangeCalculator.java:118: variable fourthDenomination might not have been initialized
                if (fourthDenomination !=100)