The 's' replaces a single Area match at any given time however the 's+' replaces the whole Area sequence at the same time with the second parameter.
The rationalization guiding the code if I am employing %s rather than %c in my printf portion in the code eighty one
If you always use /S, you can ignore the exception and just keep in mind the "usual" situation. The downside is that cmd.
* Will cause fprintf to pad the output till it is actually n people extensive, the place n is an integer price stored in the a functionality argument just previous that represented by the modified type.
The width isn't laid out in the format string, but as yet another integer worth argument previous the argument that must be formatted.
anubhavaanubhava 781k6666 gold badges590590 silver badges660660 bronze badges Increase a remark
The %s token permits me to insert (and perhaps structure) a string. Recognize the %s token is replaced by whichever I pass to your string after the % symbol.
The 1st a person matches an individual whitespace, whereas the second 1 matches a person or several whitespaces. They're the so-called typical expression quantifiers, plus they complete matches such as this (taken within the documentation):
then the string MY_COMMAND is going to be parsed precisely just as if it have been typed in the command prompt. If you're taking command-line input within the consumer, or if you're a library processing a command line furnished by an software, that's most likely a good idea. As an example, the C runtime library procedure() function may very well be carried out in this manner.
and so these information will not be similar to C code data files. Note that C data files could be inlined with assembly Guidance.
This executes SomeCommand.exe redirecting conventional output into a temp file and conventional error to the exact same area:
@barlop, the point of /S is that if you do not know upfront whether or not the command has embedded estimates or not. If there are precisely two quotations around the command line it really is taken care of in different ways by default if you'll find specifically two quote figures than if you will discover additional or less. /S causes it to be be dealt with the exact same. It can be documented: Just style "aid cmd" on the command line.
And so the arguments expected by C, ought to be hacked up with the C runtime library. The running system only materials just one string Together with the arguments in, and In case your language just isn't C (and even if it is) it might not be interpreted as Area-separated arguments quoted Based on shell guidelines, but as a thing entirely different.
So Should you have a complicated command which you need to move to CMD.exe you possibly have to remember CMD's argument quoting rules, and properly escape all of the rates, or use /S, which triggers a Specific non-parsing rule of "Strip initially and last " and address all other characters since the command to execute unchanged".
.S information are supply code documents prepared in assembly. Assembly is an extremely very low-level kind of programming. The documents contain here assembly Guidelines to the processor in sequential buy and are typically compiled dependant on a selected architecture.
The PEP isn't going to say "supplanted" and in no A part of the PEP does it say the % operator is deprecated (yet it does say other points are deprecated down the bottom). You may perhaps favor str.structure and that's good, but right until there is a PEP indicating it is actually deprecated there is not any feeling in saying it is actually when it is not.