Thread: atof()

  1. #1
    Burning in Hell! Luigi's Avatar
    Join Date
    Nov 2002


    I use atof() in a function but i get stranges values..

    when converted I get the following:




    string temp_num = "";
    char dot = '.';
    while ((isdigit(temp_string[n])) || (temp_string[n] == dot))
    temp_num += temp_string[n++];
    number_value = atof(temp_num.c_str());
    what is wrong here? atof() itself?
    I also tried atol() but it wouldnt convert to decimal?

    I know someone else asked the same question but using a correction factor in my case wont solve my problem..
    Last edited by Luigi; 04-24-2003 at 11:47 PM.

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  2. #2
    Registered User
    Join Date
    Apr 2003
    "...but i get stranges values"

    I don't see any strange values. Where are they?

    "what is wrong here?"

    Where's here?

    "I also tried atol() but it wouldnt convert to decimal?"

    Maybe that's why they hit upon the function name "alpha to long"?

    You aren't going to get an exact representation of a base 10 number using base 2 which computers use. However, within about 10 decimal places, they are exact.
    Last edited by 7stud; 04-25-2003 at 02:21 AM.

  3. #3
    C++ Developer XSquared's Avatar
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    Jun 2002
    Ontario, Canada
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  4. #4
    ¡Amo fútbol!
    Join Date
    Dec 2001
    Yep, floats aren't perfect. You are either going to have to find some way to deal with that, or use doubles.

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