Hi,
I am doing a project which involves basic file operations like file
open, file copy, file rename, file remove. can anyone suggest me how to
do a file copy. The file that i create using the file open function, i
would like to copy that same file to another location.
should i use pointer or is there a better way to do it.
Thanks 3 4668
<va**********@g mail.com> wrote in message
news:11******** **************@ g10g2000cwb.goo glegroups.com.. . Hi, I am doing a project which involves basic file operations like file open, file copy, file rename, file remove. can anyone suggest me how to do a file copy. The file that i create using the file open function, i would like to copy that same file to another location. should i use pointer or is there a better way to do it.
#include <algorithm>
#include <fstream>
#include <ios>
#include <iostream>
#include <iterator>
#include <string>
int main()
{
const std::string source_loc("c:/");
const std::string dest_loc("c:/xyz/");
const std::string filename("file1 ");
std::ifstream in((source_loc + filename).c_str ());
std::ofstream out((dest_loc + filename).c_str ());
if(in && out)
{
in >> std::noskipws;
std::copy(std:: istream_iterato r<char>(in),
std::istream_it erator<char>(),
std::ostream_it erator<char>(ou t));
}
if(!in.eof())
std::cerr << "Error occurred reading input\n";
if(!out)
std::cerr << "Error occurred writing output\n";
return 0;
}
Note: the values of the strings 'source_loc' and 'dest_loc'
are subject to platform restrictions for file names. (I ran
this on Microsoft Windows).
-Mike
Mike Wahler wrote:
#include <algorithm> #include <fstream> #include <ios> #include <iostream> #include <iterator> #include <string>
int main() {
const std::string source_loc("c:/"); const std::string dest_loc("c:/xyz/"); const std::string filename("file1 ");
std::ifstream in((source_loc + filename).c_str ()); std::ofstream out((dest_loc + filename).c_str ());
if(in && out) { in >> std::noskipws;
std::copy(std:: istream_iterato r<char>(in), std::istream_it erator<char>(), std::ostream_it erator<char>(ou t));
}
if(!in.eof()) std::cerr << "Error occurred reading input\n";
if(!out) std::cerr << "Error occurred writing output\n";
return 0; }
Note: the values of the strings 'source_loc' and 'dest_loc' are subject to platform restrictions for file names. (I ran this on Microsoft Windows).
-Mike
Hi,
Replacing the code within the if(in && out) {...} block, I often do
if(in && out)
{
out<<in.rdbuf() ;
}
Is there any reason why the std::copy method above is to be preferred?
Sincerely,
Peter Jansson http://www.p-jansson.com/ http://www.jansson.net/
Peter Jansson wrote: Mike Wahler wrote:
#include <algorithm> #include <fstream> #include <ios> #include <iostream> #include <iterator> #include <string>
int main() {
const std::string source_loc("c:/"); const std::string dest_loc("c:/xyz/"); const std::string filename("file1 ");
std::ifstream in((source_loc + filename).c_str ()); std::ofstream out((dest_loc + filename).c_str ());
if(in && out) { in >> std::noskipws;
std::copy(std:: istream_iterato r<char>(in), std::istream_it erator<char>(), std::ostream_it erator<char>(ou t));
}
if(!in.eof()) std::cerr << "Error occurred reading input\n";
if(!out) std::cerr << "Error occurred writing output\n";
return 0; }
Note: the values of the strings 'source_loc' and 'dest_loc' are subject to platform restrictions for file names. (I ran this on Microsoft Windows).
-Mike
Hi,
Replacing the code within the if(in && out) {...} block, I often do
if(in && out) { out<<in.rdbuf() ; }
Is there any reason why the std::copy method above is to be preferred?
Sincerely,
Peter Jansson http://www.p-jansson.com/ http://www.jansson.net/
Thank you for the suggestions, i tried using the below method and it
worked.
ifstream Source("C:/abc.txt");
ofstream Dest("C:/abc1.txt");
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