program that extracts certain words from the string

This is a discussion on program that extracts certain words from the string within the C++ Programming forums, part of the General Programming Boards category; hey guys, Can you please help me write a program that would divide lines into the fields. Each field is ...

  1. #1
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    program that extracts certain words from the string

    hey guys,

    Can you please help me write a program that would divide lines into the fields. Each field is separated by comma. I only need to save nonnumerical fields in the array for each nonnumerical column. For example:

    0,tcp,http,SF,181,5450,0,0,0,0,0,1,0,0,0,0,0,0,0,0 ,0,0,8,8,0.00,0.00,0.00,0.00,1.00,0.00,0.00,9,9,1. 00,0.00,0.11,0.00,0.00,0.00
    ,0.00,0.00,normal.
    0,udp,ftp,SF,239,486,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0 ,0,8,8,0.00,0.00,0.00,0.00,1.00,0.00,0.00,19,19,1. 00,0.00,0.05,0.00,0.00,0.0
    0,0.00,0.00,normal.
    0,tcp,smtp,SF,235,1337,0,0,0,0,0,1,0,0,0,0,0,0,0,0 ,0,0,8,8,0.00,0.00,0.00,0.00,1.00,0.00,0.00,29,29, 1.00,0.00,0.03,0.00,0.00,0.
    00,0.00,0.00,normal.
    0,tcp,http,SF,219,1337,0,0,0,0,0,1,0,0,0,0,0,0,0,0 ,0,0,6,6,0.00,0.00,0.00,0.00,1.00,0.00,0.00,39,39, 1.00,0.00,0.03,0.00,0.00,0.
    00,0.00,0.00,smurf.

    I would like to save each nonnumerical column (in this case 2nd column - starting with tcp, 3rd column starting with http, 4th column - SF and 42nd column - starting with normal) in separate array. Each array would contain different values for the same field in the column. (For example, 3rd column contains http, ftp, smtp, etc...)
    How would you do this with a C++ program (not standard C)?

    Thanks a lot!

    ~Dmitry
    Dmitry Kashlev

  2. #2
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    Re: program that extracts certain words from the string

    Originally posted by MKashlev

    0,tcp,http,SF,181,5450,0,0,0,0,0,1,0,0,0,0,0,0,0,0 ,0,0,8,8,0.00,0.00,0.00,0.00,1.00,0.00,0.00,9,9,1. 00,0.00,0.11,0.00,0.00,0.00
    ,0.00,0.00,normal.
    0,udp,ftp,SF,239,486,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0 ,0,8,8,0.00,0.00,0.00,0.00,1.00,0.00,0.00,19,19,1. 00,0.00,0.05,0.00,0.00,0.0
    0,0.00,0.00,normal.

    How would you do this with a C++ program (not standard C)?

    ~Dmitry
    The file is in error. Look:
    0,tcp,http,...
    0,udp,ftp,...

    The size is not uniform. This is a problem and to fix it your file should look like this:
    0,tcp,http,...
    0,udp,fpt ,...

    In other words, you need to make each filed as large as the largest datamember. This means leaving white spaces, that way it is very easy to use a structure to efficiently parse everything. You really only learn this in a language like Cobol.

  3. #3
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    vector<struct rec> History;

    while (fgets(cArray,256,fptr) != NULL)
    {

    sscanf(cArray,"%2*,%3c,%1*,%4c", rec.item1, rec.item2);

    History.push_back (rec);
    }
    0,tcp,http,...
    12 1
    Last edited by Troll_King; 08-06-2002 at 11:07 AM.

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