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//program to demonstrate multiple inheritance, example of virtual base classes #include<iostream.h> #include<conio.h> class Base { public: int a; }; class D1 : virtual public Base { public: int b; }; class D2 : virtual public Base { public: int c; }; class D3:public D1, public D2 { public: int total; }; void main() { D3 ob; clrscr(); ob.a=25; //unambigous ob.b=50; ob.c=75; ob.total=ob.a+ob.b+ob.c; // unamibigous cout<<ob.a<<"\t"<<ob.b<<"\t"<<ob.c<<"\t"<<ob.total; getch(); }