Issue with regular expressions in C++

Question

I tried to use the following regular expression, which already works in C#, in C++ as well but it\'s not working in C++.

Answer 1

A simple regular expression that works with VC++ and fits your description would be

  std::regex("^([^%]|%(\\.[0-9]+)?[a-zA-Z])*$", std::regex::extended)

Live demo

(Change [0-9]+ to [0-9]* if digits after %. should be optional).