//  File: io6.C
//
//  File I/O

#include <iostream.h>
#include <fstream.h>    // for ifstream, ofstream, etc
#include <iomanip.h>    // for endl, setw(), etc
#include <limits.h>     // for INT_MAX constant, etc
#include <stdlib.h>     // for exit(), etc

#define BUFLEN 33

typedef char buffer[BUFLEN] ;

main() {
   buffer fname ;
   ifstream ifile ;
   int n = 0, data, *A ;

   // Get filename
   //
   cout << "Enter a filename: " ;
   cin >> setw(BUFLEN) >> fname ;
   cin.ignore(INT_MAX, '\n') ;

   ifile.open(fname) ;
   if (ifile == NULL) {
      cerr << "Could not open file: " << fname << endl ;
      exit(1) ;
   }

   // Read in an array of integers.  First number is
   // the size of the array.
   //
   ifile >> n ;
   if (!ifile.good()) {
      cerr << "Could not find array size. Bye!" << endl ;
      exit(1) ;
   }

   A = new int[n] ;
   if (A == NULL) {
      cerr << "Out of memory! Bye!" << endl ;
      exit(1) ;
   }

   int i = 0 ;
   while (true) {

      ifile >> data ;

      if (ifile.eof()) {
         if (i == n) break ;
         cerr << "File is short! Bye!" << endl ;
         exit(1) ;
      }

      if (!ifile.good()) {
         cerr << "Bad data format! Bye!" << endl ;
         exit(1) ;
      }

      if (i >= n) {
         cerr << "File is long! Bye!" << endl ;
         exit(1) ;
      }

      A[i] = data ;
      i++ ;
   }
   ifile.close() ;


   ofstream ofile ;

   ofile.open("dump") ;
   if (ofile == NULL) {
      cerr << "Could not open output file!" << endl ;
      exit(1) ;
   }

   for (i = 0 ; i < n ; i++) {
      ofile << "A[" << i << "] = " << A[i] << endl ;
   }

   ofile.close() ;
}