C++ cin stream problem

[alantheweasel]

Hi , i got a problem of cin concept :

i dont know what is the meaning of cin.clear() and cin.sync() ?

please help /_\ i have considered a long time

[cire]

cin.clear() clears the error state of the stream.
cin.sync() has no meaning, although in some compilers it will remove existing data from the buffer associated with cin.

ignore would be a better choice than sync

[Stewbond]

http://cplusplus.com/reference/ios/ios/clear/
http://cplusplus.com/reference/istream/istream/sync/