Demo No 3f Inheritance VI </HEAD> <BODY> <H1> <CENTER><B> <FONT SIZE= 4>Inheritance</FONT></B> </CENTER></H1> <H2> <FONT SIZE= 3>You can pass Constructor argument objects from </FONT> </H2> <H2> <FONT SIZE= 3> a Derived class constructor to a Base class constructor</FONT> </H2> <P> <HR> <PRE> #include <iostream.h> class Base { protected: int base_data_x; public: Base() : base_data_x (0) { cout << "Base - Zero argument Constructor called : " << base_data_x << endl; } Base(int i): base_data_x(i) { cout << "Base - One argument Constructor called : " << base_data_x << endl; } ~Base() { cout << "Base destructor called" << endl << endl; } int Get() { return base_data_x;} }; class Derived: public Base { protected: int derived_data_x; public: Derived() { cout << "Derived - Zero argument constructor called at address: " << &derived_data_x << " the value is: " << derived_data_x << endl; } Derived(int i): Base(i), derived_data_x(i) { cout << "Derived - One argument constructor called: " << derived_data_x << endl; } ~Derived() { cout << "Derived class destructor called" << endl; } }; void main() { Derived D; cout << "Derived - Zero argument constructor, Get() returns: " << D.Get() << endl << endl; Derived D_1(100); cout << "Derived - One argument constructor, Get() returns : " << D_1.Get() << endl << endl; } <BR> <HR> /* Base - Zero argument Constructor called : 0 Derived - Zero argument constructor called at address: 0x0064FDE0 the value is: 4203104 Derived - Zero argument constructor, Get() returns: 0 Base - One argument Constructor called : 100 Derived - One argument constructor called: 100 Derived - One argument constructor, Get() returns : 100 Derived class destructor called Base destructor called Derived class destructor called Base destructor called Press any key to continue */ </PRE> <BR><HR> <A HREF="week2.html">Go Back to Inheritance</A> </BODY> </HTML>