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Thread: please help

  1. #1
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    Default please help

    i need help with the following code below....

    Basically what the program should do is take and input from the user ("in dollars and cents; Eg: $1.04 or $6") round up the value (if necessary) and print out the relevant coin combination.

    my program works well with some values but if i enter a value with a 5 Cents it doesn't print out the correct coin combination; and also I'm having problems with rounding the value.

    I'm stuck.....

    please help me

     
    import java.util.Scanner;
     
    public class CoinCalculator {
     
    	public static void main(String[] args) {
    		Scanner scan = new Scanner(System.in);
    		double total;
    		int twoDollars;
    		int oneDollar;
    		int fiftyCents;
    		int twentyCents;
    		int tenCents;
    		int fiveCents;
    		int totalCents;
     
    		System.out.print("Please enter an Amount:$ ");
    		 total = scan.nextDouble();
     
    		totalCents = (int)total;
    		totalCents = (int)(100 * total);
     
    		twoDollars = (int)((total) / 2);
    		oneDollar = (int) ((total - (twoDollars * 2)) / 1);
    		fiftyCents = (int)((total - (twoDollars * 2) - (oneDollar * 1)) / .50);
    	twentyCents = (int)((total - (twoDollars * 2) - (oneDollar * 1) - (fiftyCents * .50)) / .20);
    	tenCents = (int)((total - (twoDollars * 2) - (oneDollar * 1) - (fiftyCents * .50) - (twentyCents * .20)) / .10);
    fiveCents =(int) ((total-(twoDollars * 2)-(oneDollar * 1)-(fiftyCents * .50) - (twentyCents * .20) - (tenCents * .10))/.05);
     
     
     
     
    		System.out.println("Two Dollar(s): " + twoDollars);
    		System.out.println("One Dollar(s): " + oneDollar);
    		System.out.println("Fifty Cent(s): " + fiftyCents);
    		System.out.println("Twenty Cent(s): " + twentyCents);
    		System.out.println("Ten Cent(s): " + tenCents);
    		System.out.println("Five Cent(s): " + fiveCents);
     
    	}
    }

  2. #2
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    Default Re: please help

    You will need to tell us what you are getting and what you expect. "It isn't working" does not provide us with enough information.

    Also, are you familiar with the mod function? Basically, mod returns the remainder after division. You can simply your logic this way.

    For example, let's take the following value with your layout: $3.85
    1. Two Dollars: (int)($3.85 / 2) = 1.
    2. double tracker = 3.85 % 2 = 1.85
    3. One Dollar: (int)(tracker / 1) = 1.
    4. tracker = tracker % 1 = 0.85
    5. Fifty Cents = (int)(tracker / .5) = 1
    6. tracker = tracker % .5 = 0.35
    7. Twenty Cents = (int)(tracker / .2) = 1
    8. tracker = tracker % .2 = 0.15
    9. Ten Cents = (int)(tracker / .1) = 1
    10. tracker = tracker % .1 = 0.05
    11. Five Cents = (int)(tracker / .05) = 1
    12. tracker = tracker % .05 = 0

    This way you don't have to redo the math for each part over and over again, which obviously reduces the risk of a mathematical mistake.
    Just my 5 cents (pun intended)
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  3. The Following User Says Thank You to aussiemcgr For This Useful Post:

    inchikakoroma (May 23rd, 2013)

  4. #3
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    Default Re: please help

    Quote Originally Posted by aussiemcgr View Post
    You will need to tell us what you are getting and what you expect. "It isn't working" does not provide us with enough information.

    Also, are you familiar with the mod function? Basically, mod returns the remainder after division. You can simply your logic this way.

    For example, let's take the following value with your layout: $3.85
    1. Two Dollars: (int)($3.85 / 2) = 1.
    2. double tracker = 3.85 % 2 = 1.85
    3. One Dollar: (int)(tracker / 1) = 1.
    4. tracker = tracker % 1 = 0.85
    5. Fifty Cents = (int)(tracker / .5) = 1
    6. tracker = tracker % .5 = 0.35
    7. Twenty Cents = (int)(tracker / .2) = 1
    8. tracker = tracker % .2 = 0.15
    9. Ten Cents = (int)(tracker / .1) = 1
    10. tracker = tracker % .1 = 0.05
    11. Five Cents = (int)(tracker / .05) = 1
    12. tracker = tracker % .05 = 0

    This way you don't have to redo the math for each part over and over again, which obviously reduces the risk of a mathematical mistake.
    Just my 5 cents (pun intended)

    thanks for your help

    sorry for not giving enough information

    Basically what the program should do is take and input from the user ("in dollars and cents; Eg: $1.04 or $6") round up the value (if necessary) and print out the relevant coin combination.

    my program works well with some values but if i enter a value with a 5 Cents it doesn't print out the correct coin combination; and also I'm having problems with rounding the value.

    thanks for your help

  5. #4
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    Default Re: please help

    That is not more/better information. You just repeated what you said in the original post.
    Improving the world one idiot at a time!

  6. #5
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    Default Re: please help

    because original post was changed to provide people with more info