/* Filename:  readform.cpp

   Author:  Br. David Carlson

   Date:  February 1, 1998

   Last modified:  February 21, 2013

   This program prompts the user for the name of a file to read.  This
   must be a formatted text file as created by the makeform program.
   It assumes that each product name consists of just one word of up to
   40 characters.  The data from the file is displayed on the screen.

   Tested with:
      Microsoft Visual C++ 2008
      g++ under Linux
*/

#include <iostream>
#include <iomanip>
#include <fstream>   // needed for files
using namespace std;

const int MaxString = 120;
typedef char StringType[MaxString];

void DisplayFile(fstream & InFile);


int main(void)
   {
   StringType FileName;
   fstream InFile;

   cout << "Enter the name of the text file to be read: ";
   cin.getline(FileName, MaxString);

   InFile.open(FileName, ios::in);
   if (InFile.fail())
      {
      cerr << "Could not open file " << FileName << endl;
      exit(1);
      }

   DisplayFile(InFile);
   InFile.close();
   return 0;
   }


/* Given:   InFile   A file stream already opened for input.
   Assumes: That InFile is associated with a text file of the type 
            described at the top of this program.
   Task:    To read the data from InFile and display it on the screen.
   Return:  InFile   The modified file stream.
*/
void DisplayFile(fstream & InFile)
   {
   StringType ProductName;
   float Price;
   int Count = 0;

   InFile >> ProductName;

   while (! InFile.fail())
      {
      InFile >> Price;
      InFile.get(); // read the newline and discard it
      cout << setw(40) << ProductName << setw(12) << Price << endl;
      Count++;

      if (Count == 22)
         {
         Count = 0;
         cout << "   Press ENTER to go on...";
         cin.get();
         }

      InFile >> ProductName;
      }

   if (Count != 0)
      {
      cout << "   Press ENTER to go on...";
      cin.get();
      }
   }