How can we copy the contents of one file to another in one shot?

#include <fstream.h>

void main( )

{

     char source [ 67 ], target [ 67 ];
     char ch;
     cout << endl << "Enter source filename";
     cin >> source;
     cout << endl << "Enter target filename";
     cin >> target;
     ifstream infile ( source );
     ofstream outfile ( target );
     outfile << infile.rdbuf( );

}

Here all the copying is done through the single statement

outfile << infile.rdbuf( );

The function rdbuf( ) returns the address of the strstreambuf where the values are stored.