How to get decoded String from UTF16 encoded String in C++

I'm trying to get decoded String from UTF16 encoded String in C++.

Current value of UTF16 is \u5f00\u53d1\u8005 and original string is 开发者 In other words, \u5f00\u53d1\u8005 ==> 开发者" using C++.

How can I do this using C++?