/* Filename:  readkeyb.cpp

   Author:  Br. David Carlson; Br. Isidore Minerd

   Date:  January 8, 2000

   Modified:  June 26, 2000; August 22, 2001; July 16, 2009

   This program reads floating point numbers from the keyboard
   and finds and prints their average.  The numbers should be entered
   one at a time, as prompted.  Use CTRL z to end data input when
   using Visual C++ on a PC.  You may need to press ENTER a couple
   of times.  However, this must be changed to using CTRL d when
   using g++ under Linux, as CTRL d is the Unix/Linux end of file.
   This will also fail when an invalid format of data is entered.

   Tested with:
      Microsoft Visual C++ 6.0
      Microsoft Visual C++ .NET
      Microsoft Visual Studio 2008
      g++ under Linux
*/

#include <iostream>
using namespace std;


int main(void)
   {
   float Num, Total;
   int Count;

   Count = 0;
   Total = 0.0;

   // Warning: Change this to CTRL d for Linux:
   cout << "Enter a floating point number (or CTRL z to end): " << endl;
   cin >> Num;

   while (! cin.fail())
      {
      Total = Total + Num;
      Count++;
      // Warning: Change this to CTRL d for Linux:
      cout << "Enter a floating point number (or CTRL z to end): " << endl;
      cin >> Num;
      }

   if (Count > 0)
      cout << "Average is " << Total / Count << endl;
   else
      cout << "No data given" << endl;

   return 0;
   }