#include <iostream>
#include <string>
#include <cstring>
using namespace std;

int main() {
  string cpps1 = "ABC", cpps2 = "DEF", cpps3 = "abc ";  // c++ style strings
  char cs1[] = "ABC", cs2[] = "DEF", cs3[] = "abc "; // c style strings
  bool a1, a2, a3;

  cout << "comparing C++ style strings:\n";
  a1 = ( cpps1 < cpps2 );
  a2 = ( cpps3 < cpps2 );
  a3 = ( cpps1 < cpps3 );
  cout << " is \"" << cpps1 << "\" < \"" << cpps2 << "\"? " << a1 << endl;
  cout << " is \"" << cpps3 << "\" < \"" << cpps2 << "\"? " << a2 << endl;
  cout << " is \"" << cpps1 << "\" < \"" << cpps3 << "\"? " << a3 << endl;

  cout << "comparing C style strings (the WRONG WAY!):\n";
  a1 = ( cs1 < cs2 );
  a2 = ( cs3 < cs2 );
  a3 = ( cs1 < cs3 );
  cout << " is \"" << cs1 << "\" < \"" << cs2 << "\"? " << a1 << endl;
  cout << " is \"" << cs3 << "\" < \"" << cs2 << "\"? " << a2 << endl;
  cout << " is \"" << cs1 << "\" < \"" << cs3 << "\"? " << a3 << endl;

  cout << "comparing C style strings using strcmp (the RIGHT WAY!):\n";
  a1 = ( strcmp( cs1, cs2 ) < 0 );
  a2 = ( strcmp( cs3, cs2 ) < 0 );
  a3 = ( strcmp( cs1, cs3 ) < 0 );
  cout << " is \"" << cs1 << "\" < \"" << cs2 << "\"? " << a1 << endl;
  cout << " is \"" << cs3 << "\" < \"" << cs2 << "\"? " << a2 << endl;
  cout << " is \"" << cs1 << "\" < \"" << cs3 << "\"? " << a3 << endl;

} // end of main()


/* output:
comparing C++ style strings:
 is "ABC" < "DEF"? 1
 is "abc " < "DEF"? 0
 is "ABC" < "abc "? 1
comparing C style strings (the WRONG WAY!):
 is "ABC" < "DEF"? 0
 is "abc " < "DEF"? 1
 is "ABC" < "abc "? 0
comparing C style strings using strcmp (the RIGHT WAY!):
 is "ABC" < "DEF"? 1
 is "abc " < "DEF"? 0
 is "ABC" < "abc "? 1
*/