What are the two main components of C++?

The C++ language itself has two main components, namely a direct mapping of hardware features, which are provided primarily by the C subset, and zero-overhead abstractions, which are based on those mappings. This is also why C++ is considered to be a highly portable language as compared to others. It is often the language of choice for multi-device, multi-platform app development and large-scale commercial applications for end users.