ostringstream 用法

// ostringstream::rdbuf#include <string>       // std::string#include <iostream>     // std::cout#include <sstream>      // std::ostringstreamint main () {  std::ostringstream oss;  oss << "One hundred and one: " << 101;  std::string s = oss.str();  std::cout << s << '\n';  return 0;}