/****************************************************************/
/*  Purpose:     Trivial example illustrating stdin and eof     */
/*               (also illustrates use of char for ints)        */
/*  Name:        M. Overstreet                                  */
/*  Date:        25 Sept. 2003                                  */
/*  Description: Reads and prints numbers until eof             */
/****************************************************************/

/****************************************************************/
/* Listing Contents:                                            */
/*   Reuse instructions                                         */
/*   Compilation instructions                                   */
/*   Source code                                                */
/****************************************************************/

/****************************************************************/
/*   Reuse Instructions                                         */
/*      Program is so short, reuse opportunities are limited -- */
/*      unless the student is really having trouble with stdin  */
/*      and eof.                                                */
/****************************************************************/

/****************************************************************/
/*   Compilation Instructions                                   */
/*   Compiled under Solaris with                                */
/*   g++ -o eof eof.cpp                                         */
/****************************************************************/

using namespace std;
         
#include <iostream>

/****************************************************************/
/*  Precondition:  Input must be valid numerics.                */
/*                 Input must be pairs of numbers               */
/*  Postcondition: Input values are printed.                    */
/*                 Sum and count of number of values read is    */
/*                 printed.                                     */
/****************************************************************/
int main()
{
   char c1, c2;               /* int values read               */
   char sum = 0;              /* used to sum elements          */
   int ct = 0;                /* count of number of pairs read */
   int tmp;

   /* Read number pairs till end of file, summing and counting  */
     cin >> tmp;
     while ( cin )
     {
       c1 = tmp;
       sum += c1;
       ct++;
       cin >> tmp;
       c2 = tmp;
       sum += c2;
       cout << "c1: " << (int)c1 << ",  c2: " << (int)c2  << endl;
       cout << "sum: " << sum << endl;
       cout << "sum: " << (int)sum << endl;
       cin >> tmp;
     }

   /* Report results of run */
     cout << ct << " pairs of numbers read." << endl
          << "sum of values:  " << (int)sum << endl;
}