Answer 1

Tutorials

- C plusplus

http://www.cplusplus.com/doc/

- Tutorial Point

https://www.tutorialspoint.com/cplusplus/index.htm

Learn CPP

http://www.learncpp.com/

Mohammed Ba tis https://stackoverflow.com/questions/34967756/where-is-the-official-c-documentation

https://www.sololearn.com/discuss/459759/?ref=app