//***********************************************************************
//
//   circle.cpp
//   Prints out the circumference and area of a circle with given radius
//   Compile:  g++  -o circle  circle.cpp
//
//   Algorithm:
//   1.) print 'Enter the circle radius'
//   2.) get radius
//   3.) area <- pi*radius*radius
//   4.) circumference <- 2*pi*radius
//   5.) print 'the area is ' area
//   6.) print 'the circumference is ' circumference
//   7.) stop
//
//***********************************************************************

#include<iostream>
using namespace std;

int main(){

   double radius;
   double area;
   double circumference;
   const double pi = 3.14159;

   // 1.) print 'Enter the circle radius'
   cout << "Enter the circle radius: ";

   // 2.) get radius
   cin >> radius;

   // 3.) area <- pi*radius*radius
   area = pi*radius*radius;

   // 4.) circumference <- 2*pi*radius
   circumference = 2*pi*radius;

   // 5.) print 'the area is ' area
   cout << "The area is " << area << endl;

   // 6.) print 'the circumference is ' circumference
   cout << "The circumference is " << circumference << endl;

   // 7.) stop
   return 0 ;
}