您的系统已使用UTF-8，方法是使用 std :: use_facet ，您可以写下：

If your system is already in UTF-8, by using std::use_facet, you can write:

#include <iostream>
#include <locale.h>

int main() {
    std::locale::global(std::locale(""));  // (*)
    std::wcout.imbue(std::locale());
    auto& f = std::use_facet<std::ctype<wchar_t>>(std::locale());

    std::wstring str = L"Zoë Saldaña played in La maldición del padre Cardona.";

    f.toupper(&str[0], &str[0] + str.size());
    std::wcout << str << std::endl;

    return 0;
}

然后你会得到（http://ideone.com/AFHoHC ）：

ZOËSALDAÑA在LAMALDICIÓNDEL PADRE CARDONA

ZOË SALDAÑA PLAYED IN LA MALDICIÓN DEL PADRE CARDONA.

如果不起作用，您必须将（*）更改为 std :: locale :: global（std :: locale（en_US.UTF8））; 或您在平板电脑上实际具有的UTF-8语言环境。

If it don't work you will have to change (*) into std::locale::global(std::locale("en_US.UTF8")); or an UTF-8 locale you actually have on the plateform.