// Author:  Keith Shomper
// Date:    10/20/03
// Putpose: Demonstrates how to open and close files for input and output
//          by counting the words of an input file

#include <iostream>
#include <fstream>

using namespace std;

int main() {

   string s;           // For reading in words
   string filename;    // For specifying a file name
   ifstream in;        // Input file stream
   ofstream out;       // Output file stream
   int words = 0;      // For keeping track of the number of words in the file

   cout << "Please enter a file to open:  ";
   cin >> filename;
   
   // open the input file
   in.open(filename.c_str());
   if (in == 0) {
      cerr << "Error opening file " << filename << ".  Exiting ....." << endl;
      exit(1);
   }

   // get a word
   in >> s;

   // while there are characters to read
   while (!in.eof()) {

      // increment the word count
      words++;

      // get a word
      in >> s;
   }

   // build the output filename
   filename += ".cnt";

   // output the results
   out.open(filename.c_str());
   out << "There are " << words << " words in file " << 
      filename.substr(0, filename.size()-4) << endl;

   // close input and output files
   in.close();
   out.close();

   return 0;
}