#include<iostream>
#include<string>
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
int main()
{
std::string str = "測試 C++11 寬字符轉換。";
std::string ssss =fs::path(str).u8string();
std::cout << ssss << std::endl;
}
編譯命令:g++ test.cpp -o test --std=c++17 -lstdc++fs