cin.ignore()

[zydeoN]

hello, why everybody puts cin.ignore() after a cin >>.
Some people say that cin can leave a terminating character in the stream. Well, i didnt understand that. What problems can it origin? give examples, please..

[Warrior2089]

You mean
cin>>cin.ignore();
?

Hell if I know, that makes no sense.

[zydeoN]

No, i mean, for example you have an integer x. you do:

cin >> x;
cin.ignore();

Everybody use this, and i dont know why...

[eker676]

cin leaves the newline character in the stream. Adding cin.ignore() to the next line clears/ignores the newline from the stream.

This is used mainly with combinations of cin and getline. I can't think of any examples but over time you will find them if you use getline and cin together.

Take a look at this:
http://www.cplusplus.com/forum/articles/6046/

[zydeoN]

thanks a lot, you helped me...

[outsid3r]

ignore() will flush the input stream, just like C fflush(stdin), which is great for removing the annoying new lines stored at the end of the stream :P