---

c++ program to find the area of the circle

---

#include <iostream.h> 
#include<conio.h> 
const float pi = 3.1415; 
void main() 
{ 
  float area, volume, r, radius; 
  clrscr(); 
  cout<<"Enter Radius "; 
  cin>>r; 
  radius = r * r; 
  area = pi * radius; 
  volume = pi * radius * r; 
  cout<<"Area of the Circle "<<area<<endl; 
  cout<<"Volume of the Sphere "<<volume<<endl; 
  getch(); 
}

Output

Enter Radius 5
Area of the Circle 78.53
Volume of the Sphere 392.68

---