text: // 21/12/26 = Sun
  // 18/02/07 = Wed
  
  // Exercise 6.25: Write a main function that takes two arguments. Concatenate the supplied arguments and print the resulting string.
  
  #include <iostream>
  #include <string>
  
  using std::cerr;
  using std::cout;
  using std::endl;
  using std::string;
  
  int main(int argc, char ** argv)
  {
  	if (argc != 3) {
  		cerr << "Error: Require two arguments!" << endl;
  		return -1;
  	}
  	// convert argv[] to string so that concatenation is easy
  	cout << string(argv[1]) + " " + string(argv[2]) << endl;
  	return 0;
  }
  