#include <map>
#include <string>
#include <vector>

class my_class
{
 public:
  string str;
  my_class (const std::string& s) : str (s) {}
};

int main(int argc, char** argv)
{
  std::map<string,int> my_map;
  std::vector<my_class> my_vector;

  my_map["abc"] = 23;
  my_map["def"] = 42;

  my_vector.push_back (my_class ("foo"));
  my_vector.push_back (my_class ("bar"));

  return 0;
}