/* Filename:  readtext.cpp

   Author:  Br. David Carlson

   Date:  February 23, 1998

   Last Modified:  February 21, 2013

   This program reads a text file (named parts.txt) of parts data,
   displaying the info on the screen.  The data for each part consists
   of an ID number, number in stock, price, and description, each on
   a new line of the file.  See the related program, maketext.cpp,
   as a way to create a parts.txt file.

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

   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 ReadFile(fstream & fs);


int main(void)
   {
   fstream PartFile;

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

   ReadFile(PartFile);
   PartFile.close();
   return 0;
   }


/* Given:   fs   A text 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)
   {
   PartType Part;

   // Read the first line of the file:
   fs >> Part.ID;

   while (! fs.fail())
      {
      // Read the rest of the data on this part:
      fs >> Part.NumInStock;
      fs >> Part.Price;
      fs.get();  // get the newline at the end of the price
      fs.getline(Part.Descrip, DescripMax);

      // 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 ID from the file:
      fs >> Part.ID;
      }
   }