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Thread: [RESOLVED] String concatenation

  1. #1
    John E is offline Elite Member Power Poster
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    [RESOLVED] String concatenation

    I'm building a project which uses stuff like this:-

    Code:
    #define MXFPRIu08 "u"
    
    // whatever...
    
    fprintf(f, "%03"MXFPRIu08, i);
    I'm guessing the above should get converted to fprintf(f, "%03u", i); but instead, the compiler is giving me:-

    Code:
    error C3688: invalid literal suffix 'MXFPRIu08'; literal operator or literal operator template 'operator ""MXFPRIu08' not found
    This code has been written by someone who I know to be a competent programmer so I assume there must be something wrong at my end. Do I need to set something up to make this work?
    "A problem well stated is a problem half solved. - Charles F. Kettering

  2. #2
    2kaud's Avatar
    2kaud is offline Super Moderator Power Poster
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    Re: String concatenation

    yeah - An oldy but a goody! In VS You need a space between "%03" and MXFPRIu08.

    Code:
    fprintf(f, "%03" MXFPRIu08, i);
    All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!

    C++17 Compiler: Microsoft VS2017 (15.8.7)

  3. #3
    John E is offline Elite Member Power Poster
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    Re: String concatenation

    Thanks 2kaud - I would never have guessed at that !!
    "A problem well stated is a problem half solved. - Charles F. Kettering

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