What's the difference between cin.fail() and !cin in C++?

Question

I'm studying the different input errors in C++. I understand that !cin returns true when there's any problem establishing an input stream. But I can't clearly appreciate the difference with cin.fail(). Can anyone clarify it for me please?

What's unclear from the [documentation](http://en.cppreference.com/w/cpp/io/basic_ios/fail) — πάντα ῥεῖ, Jun 25 '17 at 12:02
Possible duplicate of [Correct way to use cin.fail()](https://stackoverflow.com/questions/17928865/correct-way-to-use-cin-fail) — Ramesh-X, Jun 25 '17 at 12:10

Chenna Reddy · Accepted Answer · 2017-06-25T12:20:21.213

3

Both are same. fail is a typical function where is '!' is an overloaded operator. You may want to check reference http://www.cplusplus.com/reference/ios/ios/fail/ before posting.

edited Jun 25 '17 at 12:20

answered Jun 25 '17 at 12:07

Chenna Reddy

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OK, my bad, sorry. – πάντα ῥεῖ Jun 25 '17 at 12:22

What's the difference between cin.fail() and !cin in C++?

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