fflush(stdin).Whats is it doing?

[digitalMaster]

what fflush(stdin) doing in c?

[LemonSpice]

what fflush(stdin) doing in c?

is this a directory you are talking about

[digitalMaster]

is this a directory you are talking about

yes

[DavidTheWin]

10 seconds in google

https://www.google.co.uk/webhp?sourceid=chrome-instant&rlz=1C1CHFX_enGB521GB521&ion=1&espv=2&ie=UTF-8#q=fflush%20stdin

 

http://stackoverflow.com/questions/18170410/what-is-the-use-of-fflushstdin-in-c-programming

 

 

It's not in standard C, so the behavior is undefined.

Some implementation uses it to clear stdin buffer.

From C11 7.21.5.2 The fflush function, fflush works only with output/update stream, not input stream.

If stream points to an output stream or an update stream in which the most recent operation was not input, the fflush function causes any unwritten data for that stream to be delivered to the host environment to be written to the file; otherwise, the behavior is undefined.

[Arphenyte]

fflush(stdin) clears the input buffer.

It's not recommended to always use it, cuz you might clear something you find valuable in your program.

You should use it (for example) when you are inputting a string while being on a loop. So you clear your buffer every loop before typing the string. That's just an example tho.

[Avratz]

It's committing undefined behavior. Don't do it.

 

It's perpetuated by new, unaware programmers, and bad advice.