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Area of Circle in C++

  1. Forget Code
  2. C++
  3. Area of Circle 
// AREA OF THE CIRCLE

#include<iostream.h>
#include<conio.h>
#define PI 3.14159
class circle
{
float ar;
public:
void area(float r)
{

ar=PI * r * r;
cout<<"the area of the circle is:"<<ar;
}
};
void main()
{
circle c;
float r;
cout<<"Enter the radius:";
cin>>r;
c.area(r);
getch();
}