// area BY author name,  CSCI 2170-sec, Due: mm/dd/yy
// PROGRAM ID: area.cpp / The area of a circle program
// AUTHOR:  author name
// INSTALLATION:  MTSU
// REMARKS:  Example C++ program illustrating input, computation, output.

#include <iostream>
using namespace std;

const float PI=3.1415926;

int main()
{
	float radius;         // Radius of the circle (input)
	float area;           // Area of the circle
	float circumference;  // Circumference of the circle
	
	// Prompt the user for the radius
	cout << "Please enter the radius: ";
	cin >> radius;
	
	// Compute the area
	area = PI * radius;
	
	// Compute the circumference
	circumference = 2 * PI * radius;
	
	// Output results
	cout << "A circle of radius " << radius;
	cout << " has area " << area << " and circumference "
	  << circumference << endl;
	
	return 0;
}