There are many resources on the web that can help you learn C++. I've tried to give you a compiled list of some of the best resources out there to learn C++ −
http://www.tutorialspoint.com/cplusplus/ − This is a great place to learn C++ as it covers almost all basic and intermediate topics in C++ in depth and is overall a great resource to learn C++.
A Tour of C++ (Bjarne Stroustrup) − This book is a quick overview of C++ (language and standard library, and using C++11) at a high level for people who already know C++. This is a good book for experienced programmers.
Programming − Principles and Practice Using C++ (Bjarne Stroustrup) − It is an introduction to programming using C++ by Bjarne Stroustrup (creator of the language). This book assumes no previous programming experience but is not only for beginners.
The Hackerrank C++ tutorial(https://www.hackerrank.com/domains/cpp?filters%5Bsubdomains%5D%5B%5D=cpp-introduction) This is a great interactive guide to learning C++ as it has challenges that you need to solve in order to pass each level. This is by far the most rewarding way to learn.
Effective C++ (Scott Meyers) This was written with the aim of being the best second book C++ programmers should read. It presents ~50 easy-to-remember rules of thumb along with their rationale in a very accessible (and enjoyable) style.
Hackr.io(https://hackr.io/tutorials/learn-c-plus-plus) also has a great collection of links and resources to learn C++.
Udacity(https://in.udacity.com/course/c-for-programmers--ud210) also offers a great course on C++ especially for people already having some programming experience.