How does this function delete an element from a linked list?

How does this function delete an element from a linked list?

References

Reference NO 1

http://www.cs.bu.edu/teaching/c/linked-list/delete/

Reference NO 2

http://www.geeksforgeeks.org/delete-a-given-node-in-linked-list-under-given-constraints/

Reference NO 3

http://stackoverflow.com/questions/9362896/deleting-any-node-from-a-single-linked-list-when-only-pointer-to-that-node-is-gi

Reference NO 4

http://stackoverflow.com/questions/13656061/delete-node-from-linked-list-with-specific-value

Reference NO 5

http://cboard.cprogramming.com/c-programming/88108-deleting-node-linked-list.html

Reference NO 6

http://www.programmerinterview.com/index.php/data-structures/delete-a-node-in-the-middle-of-a-singly-linked-list/

Reference NO 7

#EANF#

Reference NO 8

#EANF#