CS202   4- ‹#›
nWith constructors as conversion functions and also conversion functions, avoid mutual conversions.
nMany times type conversions are specified to minimize the number of operators overloaded, especially for symmetric operators where there can be multiple combinations of types for the two operands. It can reduce the number of versions of an operator to a single, non-member.
nHowever, this can produce subtle changes in the way a program works. If we were to add a string to char * user defined conversion function to our string class, all uses of operator+ containing both char * and string types would become ambiguous.
User Defined Type Convers.