//****************************************************** v. 1/20/05
// Purpose:    Count the values in a file.
//             This can serve as an initial check for validity of
//             data file formats.
// Usage:      count [<number of expected values>] < <filename>
//             File reads standard input, so you can use redirection
//             or piping.
//             To use, you can indicate how many values should be in
//             the file as an arguement.  The program then reports
//             mismatches.  If you don't indicate the number of expected
//             values in the input file, the number read are reported.
//             It also reports the sum of all numbers in the file.  (just
//             to compare different files).
//             It has a "debug" mode.  Read code below.
// Name:       M. Overstreet
//********************************************************************
// Listing contents:
//    Purpose
//    Usage
//    Pre & Postconditions
//    Reuse instructions
//    Compilation instructions
//    Source code
//********************************************************************
// Precondtion:
//   file is assumed to contain only numeric values. 
// Postcondition:
//    If the size of the file matches, this is reported as a match"
//    If the size does not match, the actual number read is reported.
//    In both cases, the sum of values is also displayed.
//********************************************************************
// Reuse instructions:  this is so short, it has limited reuse
//    potential, but the code may server as an example of
//    command line parameter passing and error handling.
//********************************************************************
// Compilation
// Under UNIX or Linux:
//    g++ -o count -g count.cpp
//********************************************************************

using namespace std;

#include <iostream>  // for cout
#include <string>    // for atoi which converts char arrays to ints

int main( int argc, char *argv[] )
{
  double inVar, inTot;
  int inCt = 0,
    debug = 0,
    numExpected;

  // Check for command line parameters
  if ( argc>1 )
    numExpected = atoi( argv[1] );
  else
    numExpected = 10000;
  // If three parameters, assume debug mode
  if (argc==3)
    {
    cout << "debug mode.  print all values read" << endl;
    debug = 1;
    }

  cin >> inVar;
  while( cin )
  {
    inCt++;
    inTot += inVar;
    if ( debug )
      cout << inVar << endl;
    cin >> inVar;
  }

  if ( inCt == numExpected )
    cout << "File has right number of values, " << numExpected
      << " values found." << endl;
  else
    cout << "File seems to have the wrong number of values." << endl <<
      inCt << " values read" << endl <<
      numExpected << " expected" << endl;
  cout << inTot << " total of values read." << endl;
  return 0;

}