Depends how you like to learn. If it's through a book, others online have recommended this book if you're a programmer already [0]. Then go and learn the latest things they're adding in C++. If you're new to programming and like books, you could try this [1].

If you learn better through videos, maybe try out TheNewBoston's stuff on Youtube [2].

Some extra links that might be helpful [3][4].

[0]: https://tinyurl.com/ydy3kq48

[1]: http://www.stroustrup.com/4th.html

[2]: https://tinyurl.com/p53p4kw

[3]: https://stackoverflow.com/questions/388242/the-definitive-c-...

[4]: https://www.quora.com/What-are-the-best-C++-books