scanf() formatted text...

This is a discussion on scanf() formatted text... within the C Programming forums, part of the General Programming Boards category; Code: scanf("%[^(]%*c%[^0-9]%d%[^)]%*c%[^0-9]%d%[^-]%*c%[^0-9]%d", &areacode, &prefix, &suffix ); -quzah I saw this in a few posts ago... I was wondering how it ...

  1. #1
    Comment your source code! Lynux-Penguin's Avatar
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    scanf() formatted text...

    Code:
    scanf("%[^(]%*c%[^0-9]%d%[^)]%*c%[^0-9]%d%[^-]%*c%[^0-9]%d", &areacode, &prefix, &suffix );
    -quzah

    I saw this in a few posts ago... I was wondering how it works... I can kind of see but I have NEVER seen scanf() used like this before...
    -LC
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  2. #2
    ATH0 quzah's Avatar
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    Eesh. Yeah that's horribly wrong. The original intent was to scanf into 3 variables, skipping everything else. At a glance, I simply omitted '*' in too many places. I also was under the impression that if it didn't encounter what it was looking for when using '*', it would just skip on to the next anyway. Looks like you do in fact learn something new every day.

    I also drasticly over-complicated the issue. The theory was:

    skip everything up to (
    skip (
    skip everything up to 0-9
    read 0-9 into a variable
    skip everything up to )
    skip )
    skip everything up to 0-9
    read 0-9 into a variable
    skip everything up to -
    skip everything up to 0-9
    read 0-9 into a variable

    But as Salem demonstrated, you can simply do it in three reads. I over complicated the issue. (That and I commonly type while talking on the phone, which is not a GoodThing(TM) when trying to write code.)

    Quzah.
    Hope is the first step on the road to disappointment.

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