asked on

File Copy in C++

I have a file log.txt
how can I copy this file and name it the current date and time?

Thanks

ASKER CERTIFIED SOLUTION

cmaryus

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

EarthQuaker

If you want to do this using only the standard ( therefore it'll be portable ) :

#include <iostream>
#include <fstream>
#include <algorithm>
#include <string>
#include <ctime>
#include <sstream>

using namespace std;

int main()
{
time_t rawtime;
struct tm * info;
time ( &rawtime );
info = localtime ( &rawtime );

stringstream tmp;
tmp << "File_" << info->tm_mday
<< '-' << info->tm_mon
<< '-' << info->tm_year
<< '_' << info->tm_hour
<< '-' << info->tm_min
<< '-' << info->tm_sec
<< ".log";

const string strOld = "File.log";
string strNew = tmp.str();

copy(istream_iterator<char>( ifstream(strOld.c_str()) ), istream_iterator<char>(), ostream_iterator<char>( ofstream(strNew.c_str()) ));

return 0;
}

MatrixDud

Here's an easier way:

char sTimeDate[26];

struct tm *newtime;
__int64 ltime;

_time64( &ltime );
newtime = _localtime64( &ltime );
strftime( sTimeDateFile, 25, "%b %d %Y, %H:%M.txt", newtime );

CopyFile( "log.txt", sTimeDateFile, false );

For more info on the date/time formatting follow this link:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_strftime.2c_.wcsftime.asp