Answer 1

http://www.exforsys.com/tutorials/c-plus-plus/c-manipulators.html

http://www.cplusplus.com/reference/library/manipulators/

https://www.w3schools.in/cplusplus-tutorial/manipulators/

http://www.manojagarwal.co.in/use-of-manipulators-in-cpp/

I hope these provide information the use of manipulators in C++