Thread: Program trying to calculate money, won't work

Time for some debugging.
Step through the code yourself with a test value and see what happens as the program executes

I went through the code, added some thing and fixed most of the problem. However when I enter certain amounts, such as numbers ending with 3 (e.x 85.23) it gives me the wrong amount of change. Do you know why this is happening?

HTML Code:

import java.io.*;

public class ChangeProgram
{
  public static void main (String [] args) throws IOException
  {
    BufferedReader myInput = new BufferedReader (new InputStreamReader(System.in));
    
    String inputA; //String Variable is declared
    double input = 0; //Double variable is declared and set to zero
    
    
    try {//try statement
      
      System.out.println("Please enter a dollar amount or press '999' to exit: ");
      inputA = myInput.readLine();//reads user input
      input = Double.parseDouble(inputA);//coverts string into a double
      if (input <= 0 || input > 100) {
        throw new NumberFormatException();
      }
    } catch (NumberFormatException e) { // catches any characters entered as the radius
      System.err.println("Invalid number entered!");// error output sentence
      System.exit(0);
    }//end catch
    
    while (input != 0){
      
      if (input == 100){
        System.out.println("1 $100 bill");
      }
      
      if (input >= 50 || input < 100){//run, if amount is between 50 and 100
        double answer = input / 50;//divide amount by 50
        double fifty = Math.floor(answer);//round amount down to nearest whole number
        
        System.out.println(fifty + " $50 bill(s)"); //print # of bills
        double fiftyA = fifty * 50;//find the remainder
        input = input - fiftyA;
      }
      
      if(input >= 20 || input < 50){//run if amount is between 20 and 50
        double answerB = input / 20;//divide amount by 20
        double remainderA = Math.floor(answerB);//round amount down to nearset whole #
        
        System.out.println(remainderA + " $20 bill(s)");//print # of bills
        
        double twenty = remainderA * 20;//find the remainder
        input = input - twenty;
      }
      
      if(input >= 10 || input < 20){//run if amount is between 10 and 20
        double answerC = input / 10;//finds # of bills 
        double remainderC = Math.floor(answerC);//round # of bills down to nearest whole #
        
        System.out.println(remainderC + " $10 bill(s)");//print # of bills
        
        double ten = remainderC * 10;//finds remainder
        input = input - ten;
      }
      
      if(input >= 5 || input < 10){//run if amount is between 5 and 10
        double answerD = input / 5;//finds # of bills
        double remainderE = Math.floor(answerD);//round number of bills down to nearest whole #
        
        System.out.println(remainderE + " $5 bill(s)");//print # of bills
        
      double five = remainderE * 5;//finds the remainder
      input = input - five;
    }
    
    if(input >= 2 || input < 5){//run if amount is between 2 and 5
      double answerE = input / 2;//finds # of coins
      double remainderG = Math.floor(answerE);//rounds down to the nearest whole #
      
      System.out.println(remainderG + " toonie(s)");//print # of coins
      
      double two = remainderG * 2;//finds the remainder
      input = input - two;
    }
    
    if(input >= 1 || input < 2){//run if amount is between 1 and 2
      double answerF = input / 1;//finds # of coins
      double remainderI = Math.floor(answerF);//rounds down to nearest whole #
      
      System.out.println(remainderI + " loonie(s)");//prints # of coins
      
      
      double one = remainderI * 1;//finds remainder
      input = input - one;   
    }
    
    if (input >= 0.25 || input < 1){//run if amount is between 0.25 and 1
      double answerG = input / 0.25;//finds # of coins
      double remainderK = Math.floor(answerG);//rounds down to the nearest whole #
      
      System.out.println(remainderK + " quarter(s)");//prints # of coins
      
      double quarter = remainderK * 0.25;//finds remainder
      input = input - quarter;
      
    }
    
    
    if(input >= 0.10 || input < 0.25){//run if amount is between 0.10 and 0.25
      double answerH = input / 0.10;//finds # of coins
      double remainderM = Math.floor(answerH);//rounds down to the nearest whole #
      
      System.out.println(remainderM + " dime(s)");//prints # of coins
      
      double dime = remainderM * 0.10;//finds remainder
      input = input - dime;
    }
    
    if(input >= 0.05 || input < 0.10){//run if amount is between 0.05 and 0.10
      double answerI = input / 0.10;//finds # of coins
      double remainderO = Math.floor(answerI);//rounds down to nearest whole #
      
      System.out.println(remainderO + " nickel(s)");//prints # of coins
      
      double nickel = remainderO * 0.10;//finds remainder
      input = input - nickel;
    }
    
    if (input >= 0.01 || input < 0.05){//run if amount is between 0.01 and 0.05
      double answerJ = input / 0.01;//finds # of coins
      double remainderQ = Math.floor(answerJ);//rounds down to nearest whole #
      
      System.out.println(remainderQ + " penny(ies)");//prints # of coins
      
    }
    
      try {//try statement
      
      System.out.println("Please enter a dollar amount or press '999' to exit: ");
      inputA = myInput.readLine();//reads user input
      input = Double.parseDouble(inputA);//coverts string into a double
      if (input < 0 || input > 100 || input == 999) {
        throw new NumberFormatException();
      }
    } catch (NumberFormatException e) { // catches any characters entered as the radius
      System.err.println("Invalid number entered!");// error output sentence
      System.exit(0);
    }//end catch
    }//end while
   
  }//main method
  
}//ChangeProgram

See the Announcements page for the proper use of code tags, obviously you are not pasting HTML code, why use the HTML tag?

As for your question, it seems to be the same question as before, so my reply is the same as before.
Time for some debugging...