সি++ at

#include <iostream>
#include <map>
using namespace std;

int main() {
  map<string, string> user = {
      {"নাম", "মোঃ আরিফ"},
      {"দেশ", "বাংলাদেশ"}
  };

  string result = user.at("নাম");

  cout << result;
}