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Even the first one (Get maximum int value) is just plain wrong.

Although int has a 32 bit size on almost all systems it is only guaranteed to have a size of 16 bits.

The correct way of getting the size of int is including limits.h ( <climits> ) and looking at the value INT_MAX.

Do you (or anyone else) have a good source for someone who wants an introduction to bit operations?

Thanks!

It's unclear what language that is. Could that be (well-defined) Java?

Besides, it's also wrong because left shifting a signed integer "into the sign bit" is undefined.

Author is apparently trying to combine multiple languages. Maybe well defined in java, definitely not in C.

In the original Chinese article, the languages were actually mentioned. And the one we're discussing is C++. (And so as you point out, wrong.)

It annoys me that this kind of vacuous article is posted. It reminds me of an old rant about Perl tutorials: http://blogs.perl.org/users/mithaldu/2011/10/perl-tutorials-...