Re: Feedback on my style

From:
"Alf P. Steinbach" <alfps@start.no>
Newsgroups:
comp.lang.c++
Date:
Fri, 02 Mar 2007 18:06:04 +0100
Message-ID:
<54r3r4F223a3iU1@mid.individual.net>
* dydx13@hotmail.com:

Hello there,

Here is a program that I wrote in Visual Studio 2005:

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

//Programmer: Nathan D. Brown
//Date: 3-1-07
//This is exercise 2.19 from the Deitel book.

#include<iostream>

using std::cin;
using std::cout;
using std::endl;

int main()
{
    double hworked;
    double hrate;
    double salary;

    cout<<"Please enter hours worked ( -1 to exit):";
    cin>>hworked;

    if(hworked == -1){
        cout<<"No records were processed.";
    }
    else{
        while(hworked != -1){
            cout<<"Please enter hourly rate:";
            cin>>hrate;
            if(hworked > 40){
                salary = (hworked - 40) * (hrate * 1.5) + (hworked - (hworked - 40)) * hrate;
            }
            else
                salary = hworked * hrate;
            cout<<"Employee salary is "<<salary<<endl;
            cout<<"Please enter hours worked ( -1 to exit):";
            cin>>hworked;
        }
    }

    return 0;

}

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

If you could please give me some feedback on my programming style, I would appreciate it.


Please replaces tabs with spaces before posting on Usenet.

I'll only comment on what you can improve.

First, you have a magic number, namely 40, in there. It should be a
named constant.

Second, the expression (hworked - (hworked - 40)) is identical to 40,
except for the academic possibility of overflow.

Third, you have duplicated code, the "Please enter hours worked" part.
That suggests using a different loop, one with exit in the middle. Like

   for( ;; )
   {
       cout << "Please ..."; cin >> hworked;
       if( hworked == -1 )
       {
           break;
       }
      // ...
   }

Hth.,

- Alf

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