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How to initialize const variables of any class in C++
#include #include using namespace std; class circle{ double r; const double pi; public: circle(double r) : pi(3.14159){ this->r=r; } double area (){ return pi*(pow(r,2)); } double circumference (){ return 2*pi*r; } }; int main(){ circle c=circle(6.70); cout<<"area of circle :"<
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