Proper use of seekg

This is a discussion on Proper use of seekg within the C++ Programming forums, part of the General Programming Boards category; I am trying to change the position stream pointer for input to the beginning of a file using Code: encodedfile.clear(); ...

  1. #1
    Registered User
    Join Date
    Oct 2012
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    71

    Proper use of seekg

    I am trying to change the position stream pointer for input to the beginning of a file using
    Code:
        encodedfile.clear();
        encodedfile.seekg(0);
    but after printing out encodedfile.tellg() afterwards, the pointer stays at -1 and I can't read any of the text inside the file.

    Here is the declaration of the variable
    Code:
    std::fstream encodedfile(encodedfilename,std::fstream::in | std::fstream::out);
    and this is where text is outputted to the file
    Code:
    while(file >> std::noskipws >> ch)
        {
            encodedfile << hasbinary[(unsigned int)ch].binaryencoding;
            cout << hasbinary[(unsigned int)ch].binaryencoding;
        }
    Is there another way to return the stream pointer to the beginning or is there a way to fix my code?
    Last edited by workisnotfun; 04-28-2013 at 05:48 PM.

  2. #2
    Registered User
    Join Date
    Oct 2012
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    71
    I also tried closing the file and reopening it with a separate variable but no good. I have no idea what's going on.

  3. #3
    Registered User
    Join Date
    May 2010
    Posts
    2,778
    Please post the smallest possible complete program that illustrates your problem.

    You probably should specify the "way" as well.

    Code:
    is.clear();
    is.seekg (0, is.beg);

    Jim

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