C++ Tutorial for Beginners 35 - Introduction to Polymorphism in C++

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#include <iostream> #include<string> using namespace std; class shape { public: void setValues(int a ,int b){ width=a; height=b; } protected: int height ; int width; }; class rectangle : public shape { public: int area(){ return (height * width); } }; class triangle : public shape { public: int area(){ return (height * width/2); } }; int main() { rectangle rec; triangle tri; shape *poly1=&rec; shape *poly2=&tri; poly1->setValues(10,20); poly2->setValues(10,20); std::cout<<rec.area()<<std::endl; std::cout<<tri.area()<<std::endl; }

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