Default Arguments

• A values that's used automatically if you omit the corresponding actual argument.

  • int fun1 ( int ski = 1, int trail = 2, int tree = 3 );

• Valid calls to fun1

  • cout << fun1( ); // uses 1 for ski, 2 for tail, and 3 for tree.
  • cout << fun1( -12 ); // uses -12 for ski, 2 for trail and 3 for tree.
  • cout << fun1( 44, 18 ); // uses 44 for ski, 18 for trail and 3 for tree.
  • cout << fun1( 8, 9, 10); // uses 8 for ski, 9 for trail, and 10 for tree.