Choose ONE from the link below to research and report on what you found out about that library. Include some of the unusual functions or uses you think are represented by the Library, something...

(errno.h)
There are multiple standard library in programming language. Out of which, errno.h is one of the header files in the standard library. This library defines the integer variable in errno, which is set by some library function and system calls to indicate in the event what went wrong. If there is any wrong event occurs during the program execution either by end user or system then this library will set value.
For system call, if return by setting errno to 0 then in that case is...