Unicode in C++

uni.cpp

$ cat uni.cpp

#include <string>
#include <iostream>
int main(int argc, char** argv) {
  std::string s("™");
  std::string t("Hello world");
  std::cout << t << s << std::endl; 
  return 0;
}

$ make uni.cpp && ./uni
g++     uni.cpp   -o uni
Hello world™