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Thread: Wildcard (*.*) [Width].[Precision] specifiers in the printf & sprintf functions ?

  1. #1
    Beginner Beginner phab is on a distinguished road
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    Wildcard (*.*) [Width].[Precision] specifiers in the printf & sprintf functions ?

    Greetings all,

    Does the DAVE4 'C code' compiler support the Wildcard character * for the Width and Precision fields in the "printf" & "sprint" functions ?


    For example...

    int16_t Width = 5;
    int16_t Precision = 3;
    float Number = 1.23456;


    sprintf( pBuff, "%*.*f", Width, Precision, Number );

    I have tried this but the result is an empty string instead of "1.234"

    Thank you very much
    PHAB

  2. #2
    Beginner Beginner phab is on a distinguished road
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    OK, it seems like I haven't enabled the "Add floating point support for printf" in the "Runtime Library" section for the Microcontroller. Not sure how I do this retrospectively as the option is greyed out.

  3. #3
    Beginner Beginner phab is on a distinguished road
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    Yes the wildcard Width and Precision specifiers are supported.

    Instructions for enabling the "Add floating point support for printf" in the "Runtime Library" section for the Microcontroller can be found here...

    https://www.infineonforums.com/threa...9266#post19266

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