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Re: Wages not calculating correctly

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Simfonika Island wrote:
> My program is not calculating the wages correctly. Can somebody please
> tell me why???
>
> /*
> * PayCheck Program
> * This program computes an employee's wages for the week
> */
> import java.util.Scanner;
> import static java.lang.System.in;

You don't need to specify the 'java.lang'.

> import static java.lang.System.out;
>
> class mainPayCheckProg
> {
>   public static void main(String args[])
>   {
>     // create an instance of the class or object
>     payCheckMethods aWage = new payCheckMethods();
>
>     Scanner prompt_user = new Scanner(in);
>
>     double payRate;
>     double hours;
>     double wages;
>     int empNum;
>
>     double max_hours = 40.0;
>     double overtime = 1.5;
>
>     out.print("Enter Employee Number: ");
>     empNum = prompt_user.nextInt();
>     out.print("Enter Pay Rate: ");
>     payRate = prompt_user.nextDouble();
>     out.print("Enter Hours Worked: ");
>     hours = prompt_user.nextDouble();
>
>     if (hours > max_hours)
>     {
>       wages = (max_hours * payRate)
>               + (hours - max_hours) * payRate * overtime;
>     }
>     else
>     {
>       wages = max_hours * payRate;
>     }
>
>     out.print("Employee Number: ");
>     out.println(empNum);
>     out.print("Pay rate: ");
>     out.println(payRate);
>     out.print("Hours worked: ");
>     out.println(hours);
>     out.print("Wages: ");
>     out.println(wages);
>   }
> }

Others have highlighted nicely the areas you ought to investigate closely. The 
example apparently is an academic exercise, and as such the key word is 
"exercise", meaning you actually have to work it yourself, and that's why the 
responses were somewhat indirect. They are helping you. Rest assured that if 
you follow through on their hints you will see the source of the difficulty.

This is the universal phenomenon of computer programming, and a skill you will 
be glad you've mastered - that of digging to the root cause of what you observe.

In this case you will come to an understanding of how variables convey 
information, or more precisely, data, or more precisely still for Java in 
particular, pointers to data and some primitives. Gene Wirchenko even gave you 
a starting point.

Roedy's advice to paper-fake the program is a foundational practice.

There's also precision of how you report an anomaly. There are useful 
debugging strategies that move you quickly to enlightenment and good software. 
The first is to report all observations surrounding the anomaly.

For example, you observed that the "program is not calculating the wages 
correctly". OK. That's not a lot of analysis yet. What exactly is the program 
calculating (copy and paste actual output)? What did you expect?

This is the heart of program testing - at its simplest, a pairing-up ("map") 
of preconditions and results (inputs and outputs). You type in "blahblah", the 
program prints "bleepbleep". You expected "bloopbloop". That begins to be 
specific.

At that point, you see from the code how that "bleepbleep" got calculated as 
you trace how the variables transform their referenced structures. Or in your 
case, primitive 'double's.

By the way, you should declare the class 'public'.

Lastly, there are coding conventions. They differ, even to being opposite, 
between computer languages. They cover naming, spelling, indentation, all that 
boring (not really) crap. For Java they start with (and for a lot of folks, 
end with)
<http://www.oracle.com/technetwork/java/codeconv-138413.html>

Some of the conventions, like declaring arrays with the brackets after the 
type, or the variable, but not both, are in the Java Language Specification 
(JLS) itself.
<http://docs.oracle.com/javase/specs/jls/se7/html/index.html>
<http://docs.oracle.com/javase/specs/jls/se7/html/jls-10.html#jls-10.2>
'We do not recommend "mixed notation" in an array variable declaration, where 
brackets appear on both the type and in declarators.'

Generally you see the brackets on the type in Java code.

-- 
Lew
Honi soit qui mal y pense.
http://upload.wikimedia.org/wikipedia/commons/c/cf/Friz.jpg

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Wages not calculating correctly Simfonika Island <simfonika@gmail.com> - 2012-04-18 13:53 -0700
  Re: Wages not calculating correctly Gene Wirchenko <genew@ocis.net> - 2012-04-18 15:04 -0700
  Re: Wages not calculating correctly Roedy Green <see_website@mindprod.com.invalid> - 2012-04-18 22:17 -0700
    Re: Wages not calculating correctly Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-04-19 00:58 -0500
      Re: Wages not calculating correctly Roedy Green <see_website@mindprod.com.invalid> - 2012-04-19 01:43 -0700
        Re: Wages not calculating correctly Gene Wirchenko <genew@ocis.net> - 2012-04-19 08:35 -0700
  Re: Wages not calculating correctly Lew <noone@lewscanon.com> - 2012-04-18 23:35 -0700

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