ifstream.close problem

This is a discussion on ifstream.close problem within the C++ Programming forums, part of the General Programming Boards category; Im trying to do this in dev c++ Im basically open a large list which contains filenames to parse and ...

  1. #1
    Registered User AzraelKans's Avatar
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    Question ifstream.close problem

    Im trying to do this in dev c++

    Im basically open a large list which contains filenames to parse
    and store the results.

    Now what im trying to do here is to open an close a file in order to be able to "parse" a number of files (which are saved in a list)
    Code:
     ifstream l_file("list.txt"); //text containing list of files.
      ifstream a_file; //the file to be parsed
      ofstream b_file("final.txt"); //file which will be filled with the result
    
      while (!l_file.eof()) //open the file list
      {
       l_file>>fname; //send the file to the filename
       a_file.open(fname); //open the text containing emails
       cout<<"filename:"<<fname<<":"<<a_file.is_open()<<endl;
       while (!a_file.eof())
       {
            a_file>>str;
            if (parseline(str)!='\0')
            {
                cout<<"linea:"<<str<<endl;
                cout<<"lineap :"<<parseline(str)<<endl;
                b_file<<parseline(str)<<endl;      //save the parsed data
            }
       }
    
       a_file.close();
       a_file.clear();
      }
      l_file.close ();
      b_file.close ();
    
    getch();
    return 0;
    }
    It looks like it should work right? well when I try to open the a_file for a second time, the program crashes. thats why I added a_file.clear but it doesnt work. is there a way to use an ifstream with 2 diferent files without crashing? how do you actually close a filestream?

    p.s.
    oh yeah, the list contains the same file like this

    example.txt
    example.txt

    so is not a file missing problem.
    Last edited by AzraelKans; 10-25-2002 at 07:47 PM.

  2. #2
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  3. #3
    Registered User AzraelKans's Avatar
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    Oct 2002
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    Talking sorry, fixed that.

    Sorry first time here, I used the code tag now .

    Now what can I do to close the ifstream?
    Last edited by AzraelKans; 10-25-2002 at 07:58 PM.

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