Program To Find Circumference of Circle

/*
Write a C++ Program to input a float number(radius of circle) and
calculate / display the Circumference of the circle.

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*/



#include<iostream.h>

#include<conio.h>

void main()
{
                                  
  clrscr();

  const float PI = 3.14;

  float radius, circumference;

  cout<<"\n Enter Radius of the Circle (to find its Circumference): ";

  cin>>radius;

  // required formula
  // Circumference of Circle = 2 x PI x R

  circumference = 2 * PI * radius;

  cout<<"\n\n ----------- Results ------------";

  cout<<"\n\n Circumference of Circle = "<<circumference;

  getch();

}