how to test a string for letters only

Question

how could I test a string against only valid characters like letters a-z?...

string name;

cout << \"Enter your name\"
cin >> name;

string lette         


        

Answer 1

  for (string::iterator it=name.begin(); it!=name.end(); ++it)
  {
    if ((*it) < 0x61 || (*it) > 0x71) 
      // string contains characters other than a-z
  }