C++11, C++14, C++17, general speaking

Since C++11, WG21, the ISO designation for the C++ standard,  try to ship the standard every 3 years.

The standard is comprised of two parts: the core language, and the STL.

1. What changes are made from c++11 to c++14:

    new features: 

2. What changes are made from c++14 to c++17

Major changes from C++14 to C++17 DIS (N4660) are: 

1. Removed or deprecated features:

    Remove trigraphs: 

    Remove register　　The register keyword remains reserved, but it no longer has any semantics.

    Remove ++ for bool　　Increment (++) prefix and postfix expressions are no longer valid for operands of type bool.

 2.