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The primary regex will match a single whitespace character. The next regex will reluctantly match a number of whitespace characters. For many purposes, both of these regexes are certainly comparable, besides in the 2nd situation, the regex can match additional of your string, if it stops the regex match from failing. from

Working with %s in scanf without an explcit discipline width opens precisely the same buffer overflow exploit that will get did; specifically, if you will find more characters while in the input stream as opposed to focus on buffer is sized to carry, scanf will Fortunately compose those added people to memory outside the buffer, probably clobbering some thing essential. Unfortunately, contrary to in printf, You can not source the sector with to be a operate time argument:

If you always use /S, you can ignore the exception and just bear in mind the "usual" scenario. The draw back is that cmd.

this assignation can be done at initialization like char term="this is the term" // the phrase assortment of chars got this string now and is statically defined

In some code that I have to maintain, I've noticed a structure specifier %*s . Can anyone notify me what This is certainly and why it is utilized?

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The %s token makes it possible for me to insert (and perhaps structure) a string. See that the %s token is replaced by whatever I pass for the string after the % symbol.

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@MichaelBurr: I'm quite confident he just needed the additional pair of estimates; the /s was redundant In such a case, as the conditions below which /s tends to make a variation were not satisfied.

and so these files are usually not the same as C code information. Notice that C files can be inlined with assembly instructions.

What I don't have an understanding of is once the estimate elimination would crack everything, for the reason that that is the only time /s ("suppress the default quotation-elimination habits") will be important. It only gets rid of rates below a certain arcane list of ailments, and a type of ailments is that the 1st character following the /c has to be a quotation mark.

@barlop, The purpose of /S is if you don't know upfront if the command has embedded estimates or not. If you'll find particularly two rates over the command line it really is addressed otherwise by default if you can find accurately two quotation figures than if you will find far more or much less. /S makes it be dealt with the same. It truly is documented: Just sort "help cmd" about the command line.

Hence the arguments envisioned by C, need to be hacked up with the C runtime library. The functioning program only supplies a single string While using the arguments in, and Should your language just isn't C (as well as whether it is) it may not be interpreted as Room-divided arguments quoted In keeping with shell policies, but as one thing wholly unique.

All I am aware is the fact that cmd.exe's command parsing (Particularly with escaping people) might be bizarre occasionally, so I've without doubt that /s is useful in at least check here one event.

This is most likely much more more likely to be attractive during the state of affairs from the concern Michael Burr associated with, the place cmd.exe is getting introduced by CreateProcess instead of from a batch file or even the command line by itself..

influence of /S is always to override this 1 exception, so which the two estimate characters remain taken out in that circumstance.