Area of circle:
area=3.14*r%r;
-Here r is the radius of the circle.
program:
#include< iostream>
class r4r
{
public:
int find_area(int radius)
{
int area;
area=3.14*radius*radius;
cout<<"Area of Circle is "<< area;
}
};
int main() {
int r;
r4r obj;
cout<<"Enter radius"<< endl;
cin>>r;
obj.find_area(r);
}
Enter radius
3
Area of Circle is 28.260000