Define a class circle with following members

Data member
Radius,Area
Member functions
Constructor function for assigning values
findArea() for finding and display it.

Programs:

#include<iostream.h>
#include<conio.h>
class circle()
private:
float r,area;
public:
circle(){}
circle(float ra)
{
r=ra;
}
void findArea()
{
cout<<"Radius="<<r<<"\n";
area=3.14*r*4;
cout<<"Area of Circle="<<area<<"\n";
}
};
void main()
{
clrscr();
circle C(3.5);
C.findArea();
getch();
}

Output:
Radius=3.5
Area of Circle=38.465