Thread: File rename script (char <--> string)

  1. #1
    Registered User kaspari22's Avatar
    Join Date
    Jul 2008
    Czech Republic, Doubravice

    File rename script (char <--> string)


    I'm trying create basic script for renaming files with date included. If I rename only char oldname to newname without date included it's working but when I include date it seems like it's string after and renamed can be only char... Even I tried restream string back to char I have a problems as

    initializer fails to determine size of `newname1' because of "#define MAX_DATE 12"

    I'm trying find way how basically rename files from original to new with current date included...

    Any idea?



    #include <sstream>
    #include <time.h>
    #define MAX_DATE 12
       time_t now;
       char the_date[MAX_DATE];
       the_date[0] = '\0';
       now = time(NULL);
       if (now != -1)
          strftime(the_date, MAX_DATE, "%d_%m_%Y", gmtime(&now));
       string datex = the_date;
       string file1 = "filename" + datex + ".TXT";
       stringstream ss;
       char replace1[] = "";
       ss << file1;
       ss >> replace1;
       int result1;
      char oldname1[] = "FILENAME.TXT";
      char newname1[] = replace1;
      result1= rename( oldname1 , newname1 );
      if ( result1 == 0 )
        puts ( "File successfully renamed" );
        perror( "Error renaming file " );

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    > char replace1[] = "";
    You haven't allocated enough space (just one character in fact).

    > result1= rename( oldname1 , newname1 );
    Rather than messing around with char arrays, do everything with std::string variables.

    When it comes to the rename, do this
    result1= rename( oldname.c_str() , newname.c_str() );
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3
    Registered User kaspari22's Avatar
    Join Date
    Jul 2008
    Czech Republic, Doubravice



    thank you very much,
    it's working...
    also I insert char replacement: string datex = the_date;
    "datex" is char

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