C++ string and wstring convert

http://blog.sina.com.cn/s/blog_7632c6010100u1et.html

http://www.codeproject.com/Tips/197097/Converting-ANSI-to-Unicode-and-back

http://www.codeproject.com/Articles/17573/Convert-Between-std-string-and-std-wstring-UTF-a

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原文地址：https://www.cnblogs.com/UnGeek/p/4016291.html