C++ is a very widely used & powerful language. We can see it in our ObjC, Swift and Arduino projects. So here is some great content from Udemy on C++ for anyone interested in the basics of C++:
Learning C++ @Udemy
Santiapps – Arduino, Raspberry Pi, Python, Internet Of Things, IoT, iOS, Android
Programming smart devices with the cloud for robotic intelligence solutions using Arduino, Raspberry Pi, Python, iOS, Android Internet Of Things Tank