How to support UTF-8 on Windows without using "chcp 65001" command in C++?

Question

I want to support UTF-8 string in my program, but the default active code page is 936.

Is there any methods to support UTF-8 without using the chcp 65001 command?

And the std::locale doesn't seem to work, it always throws an error when I'm using std::locale::global(std::locale("zh_CN.UTF-8"));:

terminate called after throwing an instance of 'std::runtime_error'
  what():  locale::facet::_S_create_c_locale name not valid

Example:

#include <iostream>
#include <codecvt>
#include <locale>

int main() {
  std::wstring a = L"中文字符串"; // a chinese string.

  using cvt = std::codecvt_utf8<wchar_t>;
  std::wstring_convert<cvt, wchar_t> converter;

  std::string x = converter.to_bytes(a);

  std::cout << x << std::endl;

  return 0;
}

Output without "chcp 65001":

涓枃瀛楃涓

Output with "chcp 65001":

Active code page: 65001
中文字符串

I don't want to use the "chcp 65001" command and don't want to see the prompt.

How can I solve the problem?