What things come in advance c language

Answer 1

Changes in c came according to its standards.
Currently latest Standerd is c17/c18
you can look into standard document for more info about changes.

Here a list of all the c/c++ standard so you don't have to wander on internet like a ghost

https://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents

Answer 2

Advanced things.