// Source: "Software Design ...", John A Robinson, Newnes, 2004, page 95.
// Program to copy one file to another
#include <iostream>
#include <fstream>
using namespace std;
int main(int argc, char **argv)
	{
	if (argc != 3)
		{
		cerr << "Usage: copy source dest\n";
		return(-1);
		}
  	ifstream in(argv[1]);	// Opens file given by argv[1] (first program line argument)
				// for reading
				// If working on a PC e.g. Borland C++, have to use
				// ifstream in(argv[1], ios::binary);
	if (!in)
		{
		cerr << "Can't open " << argv[1] << " for reading\n";
		return(-1);
		}
  	ofstream out(argv[2]);	// Opens file given by argv[2] for writing. ofstream is the
				// mirror image of ifstream (just as cout is the mirror of cin)
				// If working on a PC e.g. Borland C++, have to use
				// ofstream out(argv[2], ios::binary);
	if (!out)
		{
		cerr <<"Can't open " << argv[2] << " for writing\n";
		return(-1);
		}
	char c;
	while(in.get(c))	// Gets a character from the in file into c
				// in.get(c) returns 0 when the end of file is reached.
		out.put(c);	// Puts the character in c into out file
	in.close();
	out.close();
	return(0);
	}