9. Function templates

• Since we can build templates for classes, why not have templates for functions?

  
  // return bigger int
  int max_int( int a, int b )
  {
      return ( a > b ) ? a : b;
  }
  
  // return bigger ValueT
  template< typename ValueT >
  ValueT const& max_val( ValueT const& a, ValueT const& b )
  {
      return ( a > b ) ? a : b;
  }