/* Filename:  readpart.cpp

   Author:  Br. David Carlson

   Date:  February 23, 1998

   Revised:  July 4, 1998

   Revised:  July 16, 2000 to use modern headers.

   This program reads a binary file (named parts.dat) of parts records,
   displaying the info on the screen.  The data for each record consists
   of an ID number, number in stock, price, and description.

   Warning: this simple program does not contain anything to pause the
   scrolling of the output on the screen.
*/

#include <fstream>   // needed for files
#include "parts.h"  // needed for PartType


/* Given:   fs   A binary file stream already opened for input.
   Task:    To read parts data from fs, writing it onto the screen.
   Return:  fs   The modified file stream.
*/
void ReadFile(fstream & fs)
   {
   int RecordSize;
   PartType Part;

   RecordSize = sizeof(Part);
   // Read the first record from the file:
   fs.read(reinterpret_cast <char *> (&Part), RecordSize);

   while (! fs.fail())
      {
      // Write data from Part onto the screen:
      cout << "ID: " << Part.ID << endl;
      cout << "Number in stock: " << Part.NumInStock << endl;
      cout << "Price: " << Part.Price << endl;
      cout << Part.Descrip << endl << endl;

      // Read the next record from the file:
      fs.read(reinterpret_cast <char *> (&Part), RecordSize);
      }
   }


int main(void)
   {
   fstream PartFile;

   PartFile.open("parts.dat", ios::in | ios::binary);
   if (PartFile.fail())
      {
      cerr << "Could not open file parts.dat" << endl;
      exit(1);
      }

   ReadFile(PartFile);
   PartFile.close();

   return 0;
   }