/* Filename:  makepart.cpp

   Author:  Br. David Carlson

   Date:  February 23, 1998

   Last Revised:  February 21, 2013

   This program creates a binary file of parts records.  The data for
   each record consists of an ID number, number in stock, price, and
   description, and is read from the keyboard and written to this
   binary file, called parts.dat.

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

// iostream is indirectly included through parts.h
#include <fstream>   // needed for files
#include "parts.h"  // needed for PartType

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

void WriteToFile(fstream & fs);


int main(void)
   {
   fstream PartFile;

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

   WriteToFile(PartFile);
   PartFile.close();

   return 0;
   }


/* Given:   fs   A binary file stream already opened for output.
   Task:    To read parts data from the user, writing each record of
            accumulated data to fs.
   Return:  fs   The modified file stream.
*/
void WriteToFile(fstream & fs)
   {
   int RecordSize, Number;
   PartType Part;

   RecordSize = sizeof(Part);
   cout << "Enter a part number (or 0 to exit): ";
   cin >> Number;

   while (Number != 0)
      {
      // Put data into the Part record:
      Part.ID = Number;
      cout << "Enter number in stock: ";
      cin >> Part.NumInStock;
      cout << "Enter price: ";
      cin >> Part.Price;
      cin.get();  // input newline at end of price
      cout << "Enter description: ";
      cin.getline(Part.Descrip, DescripMax);

      // Write the Part record to the binary file:
      fs.write(reinterpret_cast <char *> (&Part), RecordSize);
      
      cout << "Enter a part number (or 0 to exit): ";
      cin >> Number;
      }
   }