Setting a variable to a maximum value

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October 9th, 2008, 09:38 PM

Trellotman

Registered User

Join Date: Oct 2008

Posts: 7

Time spent in forums: 2 h 41 m 22 sec
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Setting a variable to a maximum value

Hello everyone,

I am having trouble setting a accumulated int total to not breech a particular number. I attempted to search this out on the Forums first, but I cannot come up with anything helpful...probably due to not wording it correctly no doubt!

My example:

My program asks for the user to enter a dollar amount that is to be donated toward a local charity. If the doner is a from a business organization, the donation has no limit. However, if the doner is not from a business organization, the limit he/she can donate is $50.

Here is where I am:

Code:


// Charity Donations

import java.util.Scanner;
import java.text.DecimalFormat;

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

    int entry;
    final int max = 50;
    double donation = 0.00, totDonation;
    char choice;


    String doner = new String();

    Scanner Keyboard = new Scanner(System.in);
    DecimalFormat df = new DecimalFormat("$#.00");

    do
    {

      System.out.println("\tCharity Donation\n\n");
      System.out.println("");
      System.out.print("1 - Donate: ");
      System.out.print("0 - Quit: ");
      entry = Keyboard.nextInt();
    
     if (entry == 1)
    {

	  System.out.print("\t\nEnter Doner's Name: ");
      doner = Keyboard.next();

      System.out.print("\t\nEnter Donation Amount: ");
      donation = Keyboard.nextInt();
	  totDonation += donation;

	  System.out.print("Is Donation from a business organization? (Y/N)");
      choice = Keyboard.next();

      if (choice == 'N' || 'n')
      {
         if (donation > max)
         {
           donation == max;
         }
      }

	}

    else if (entry < 1 && entry > 1)

	{
      System.out.println("You have entered 0 to quit, have a Good Day...");

	}

      System.out.println(doner + " donated " + df.format(donation));

    }

    while (entry == 1);

      System.out.println("\n                    Finishing Totals");
	  System.out.println("\n\nTotal donated dollars: " + df.format(totDonation));

  }

}

...and then my error message...

Code:


~LOCATION~\Charity.java:48: not a statement
       donation == max;
                ^

1 error

Tool completed with exit code 1

I had several errors with the code that I've worked out over the last couple of days and now I'm down to this one, and I'm not getting it...

Your thoughts would be appreciated.

October 9th, 2008, 10:59 PM

miloshtw

Registered User

Join Date: Sep 2008

Posts: 21

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The = and == operators are not the same. The == is a conditional/boolean operator used to compare two values. The = operator is used to declare a variable.

Example:

Code:

//Operators example
if(x == 1){
   x = 2;
}

October 10th, 2008, 12:18 AM

Trellotman

Registered User

Join Date: Oct 2008

Posts: 7

Time spent in forums: 2 h 41 m 22 sec
Reputation Power: 0

Quote:

Originally Posted by miloshtw

The = and == operators are not the same. The == is a conditional/boolean operator used to compare two values. The = operator is used to declare a variable.

Example:

Code:

//Operators example
if(x == 1){
   x = 2;
}

Thank you for your response and advice. However, I'm still struggling on just how to express that if the person donating is indeed not from a company, how can I write that they can only, then, donate no more than $50.

Thanks again,

Trellotman

October 10th, 2008, 02:24 AM

Trellotman

Registered User

Join Date: Oct 2008

Posts: 7

Time spent in forums: 2 h 41 m 22 sec
Reputation Power: 0

Quote:

Originally Posted by Trellotman

Whew! Finally figured it out!

if (donation >= max)
totDonation = max;

this is what I needed. I'm not a math wiz, lol! There were other errors my posted version, but I'll post the working code tomorrow...it's late and I'm tired

Trellotman

Setting a variable to a maximum value

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