/* Date : 11th March 1999 */

/* This file writes from a text file and copies it into another text file. 
   It also appends to a file. If this file does not exist it is created.
   it uses the file i/o stream operators ofstream and ifstream
*/

#include <stdlib.h>
#include <iostream.h>
#include <fstream.h>

int main(void)
{
  int mark;
  char name[100];   // Assuming that the strings in the file < 100 chars

  // open the files
  ifstream inputstream ("test.txt");                  // reading
  if (!inputstream) {
      cerr << "Can't open test.txt" << endl;
      exit (1);
  }

  ofstream outputstream ("testout.txt");              // writing
  if (!outputstream) {
      cerr << "Can't open testout.txt" << endl;
      exit (2);
  }

  ofstream appendstream ("testapp.txt",ios::app);     // append to file
  if (!appendstream) {
      cerr << "Can't open testapp.txt" << endl;
      exit (3);
  }

  cout << "Name \t Marks" << endl;
  outputstream << "Name \t Marks" << endl;

  // reading from input file
  inputstream >> name >> mark;

  while (!inputstream.eof()) {

	// writing to output file
	outputstream << name << " \t " << mark << endl;

	//writing to file open in append mode
	appendstream << name << " \t " << mark << endl;

	// writing to screen
	cout << name << " \t " << mark << endl;

	// reading from input file
  	inputstream >> name >> mark;
   }

  // closing the files
  inputstream.close(); 
  outputstream.close(); 
  appendstream.close();
  
  return 0;
}