Re: STL jump to line

From:
"Victor Bazarov" <v.Abazarov@comAcast.net>
Newsgroups:
comp.lang.c++
Date:
Mon, 6 Aug 2007 11:56:04 -0400
Message-ID:
<f97gak$mbv$1@news.datemas.de>
raven.mp4@gmail.com wrote:

On Aug 6, 4:43 pm, "Victor Bazarov" <v.Abaza...@comAcast.net> wrote:

raven....@gmail.com wrote:

Hi. Is there any function like getline which loads specified line
from a text file? Something like getline(myfile, line, 10); where
10 means 10th line in the file.


No. It's too easy to write using 'getline' and 'ignore' to bother
putting it in the library, methinks.

V
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So how to code it?


Something like

    std::istream& skip_lines(std::istream& is, std::size_t n)
    {
        while (is && n--)
            is.ignore(
                std::numeric_limits<std::istream::streamsize>::max(),
                 '\n');
        return is;
    }

    ...
        std::ifstream myfile; // and open it
        if (skip_lines(myfile, 10))
            getline(myfile, line);

V
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