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DCOPY.CPP
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C/C++ Source or Header
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1992-02-18
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1KB
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53 lines
// Borland C++ - (C) Copyright 1991 by Borland International
/* DCOPY.CPP -- Example from Getting Started */
/* DCOPY source-file destination-file *
* copies existing source-file to destination-file *
* If latter exists, it is overwritten; if it does not *
* exist, DCOPY will create it if possible *
*/
#include <iostream.h>
#include <process.h> // for exit()
#include <fstream.h> // for ifstream, ofstream
main(int argc, char* argv[]) // access command-line arguments
{
char ch;
if (argc != 3) // test number of arguments
{
cerr << "USAGE: dcopy file1 file2\n";
exit(-1);
}
ifstream source; // declare input and output streams
ofstream dest;
source.open(argv[1],ios::nocreate); // source file must be there
if (!source)
{
cerr << "Cannot open source file " << argv[1] <<
" for input\n";
exit(-1);
}
dest.open(argv[2]); // dest file will be created if not found
// or cleared/overwritten if found
if (!dest)
{
cerr << "Cannot open destination file " << argv[2] <<
" for output\n";
exit(-1);
}
while (dest && source.get(ch)) dest.put(ch);
cout << "DCOPY completed\n";
source.close(); // close both streams
dest.close();
}