//--------------------------------------------------------------------
//
//  Example showing the use of an output file           outfile.cpp
//
//--------------------------------------------------------------------

// Reads ALL the integer values from a user-specified input file and
// outputs them to a user-specified output file.

#include <iostream.h>  // For cin and cout
#include <fstream.h>   // For file input/output

void main()
{
    ifstream inFile;       // Input file stream
    ofstream outFile;      // Output file stream
    char inFilename[21],   // Input file name
         outFilename[21];  // Output file name
    int num;               // Number read from file

    // Get the file names.
    cout << "Enter the name of the input file (try values.dat): ";
    cin >> inFilename;
    cout << "Enter the name of the output file: ";
    cin >> outFilename;

    // Open the input and output files. Flag ios::noreplace 
    // indicates that the open operation should fail if the
    // file already exists.
    inFile.open(inFilename,ios::nocreate);
    outFile.open(outFilename,ios::noreplace);

    // Check that files opened correctly.
    if ( !inFile )
       cout << "File " << inFilename
            << " could not be opened for input" << endl;
    else if ( !outFile )
       cout << "File " << outFilename
            << " could not be opened for output"
            << " (Does it already exist?)" << endl;
    else
    {
       // Read in numbers and output them to the output file.
       while ( inFile >> num )
           outFile << num << endl;

       // Close the input and output file streams.
       inFile.close();
       outFile.close();
    }
}