Trying to sort numbers from lowest to highest

This is a discussion on Trying to sort numbers from lowest to highest within the C++ Programming forums, part of the General Programming Boards category; Originally Posted by jw232 Hmm it still worked anyways. Then either you didn't need that header, or you were actually ...

  1. #16
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    Quote Originally Posted by jw232 View Post
    Hmm it still worked anyways.
    Then either you didn't need that header, or you were actually using forward slashes instead of backslashes.

  2. #17
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    Some compilers don't require backslashes to be escaped in preprocessor directives. VC++ 7.1 for example allows that include and will succesfully find the file.

  3. #18
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    Quote Originally Posted by Daved View Post
    Some compilers don't require backslashes to be escaped in preprocessor directives. VC++ 7.1 for example allows that include and will succesfully find the file.
    Is that a non-standard extension? What if you actually want to use an escape code?

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    I'm not sure about the standard-ness of it, or how effective it is with other escape sequences, I just wanted to point out that when it comes to preprocessor directives the rules are a little different.

    In this case using double backslashes does work as well, but I don't know if that's because they're parsed as a single backslash or because a double backslash in a path has the same effect as a single one.

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    Quote Originally Posted by cpjust View Post
    Is that a non-standard extension? What if you actually want to use an escape code?
    And how many of your file-names contain newline, bel, backspace or some other "escape" character? In fact, I'm pretty sure all of those are not allowed (in Windows, Linux/Unix allows all sort of "weird" filenames, including those containing just about ANY printable or non-printable characters).

    It makes sense that the rules are actually different. The C preprocessor is responsible for replacing the #include "blah.h" wiht the content of blah.h - the compiler is responsible for replacing backslash-quoted characters in strings with the relevant binary. They have no need to follow same or similar rules.

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  6. #21
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    Quote Originally Posted by matsp View Post
    And how many of your file-names contain newline, bel, backspace or some other "escape" character? In fact, I'm pretty sure all of those are not allowed (in Windows, Linux/Unix allows all sort of "weird" filenames, including those containing just about ANY printable or non-printable characters).

    It makes sense that the rules are actually different. The C preprocessor is responsible for replacing the #include "blah.h" wiht the content of blah.h - the compiler is responsible for replacing backslash-quoted characters in strings with the relevant binary. They have no need to follow same or similar rules.

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    Well for filenames, sure, but what about for #define?

  7. #22
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    But when you #define somename "some string", the C preprocessor will just replace every occurance of somename with "some string" - so the compiler proper doesn't even know it was a #define, but the preprocessor doesn't do anything with the string itself.

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