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// converting from UTF-32 to UTF-8
#include <iostream> // std::cout, std::hex
#include <string> // std::string, std::u32string
#include <locale> // std::wstring_convert
#include <codecvt> // std::codecvt_utf8
#include <cstdint> // std::uint_least32_t
int main ()
{
std::u32string str32 ( U"\U00004f60\U0000597d" ); // ni hao (你好)
std::string str8;
std::wstring_convert<std::codecvt_utf8<char32_t>,char32_t> cv;
str8 = cv.to_bytes(str32);
// print contents (as their hex representations):
std::cout << std::hex;
std::cout << "UTF-32: ";
for (char32_t c : str32)
std::cout << '[' << std::uint_least32_t(c) << ']';
std::cout << '\n';
std::cout << "UTF-8 : ";
for (char c : str8)
std::cout << '[' << int(static_cast<unsigned char>(c)) << ']';
std::cout << '\n';
return 0;
}
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