9. Standard Input Stream

• 
      typename      object name
      ------------  -----------
      std::istream  std::cin;    // cin is a predefined object
  
  

• Usage:

  
      // formatted input of C++ variables
      int x;
      cin >> x;
  
      // unformatted input of single characters
      char x = cin.get( );
  
      // line-based input of text strings
      string text;
      getline( cin, text );