abstraction mechanisms: classes and operator overloading
class/object construction - operator overloading
S - [ string class with OCCF and operator overloading ]
S class will compile to success.
s_00.cpp will not compile to success since attempts to access private
member.
default valued default constructor.
destructor is a member.
2 assignment operator is overloaded as a private member.
prohibit = between S objects
+
operator overloaded is a member
==
operator overloaded is a member