User Defined Type Convers.
		• Constructors taking a single argument define a conversion from the type of its argument to the type of its class. • Such conversion functions can be used either implicitly or explicitly. • When used implicitly, at most one implicit built-in promotion or conversion will be applied to the argument of the constructor. name(char* = "");   //implicitly convert char* to name.   name obj;  obj = "sue smith";