//Kyu Bae
//program 2A
//purpose:
//	1) use th cin object.
//	2) define a constant.
//  3) reinforce objectives of previous lab projects.

#include <iostream.h>
#include <math.h>
#include <iomanip.h>

void main (void)
{
	const double PI=3.14159;
	int Radius;
	double Area, CirCumf;
	
cout << "This program calculate the area and the " << endl;
cout << "circumference of the circle when you" << endl;
cout << "enter the radius."<< endl;
cout <<"\nEnter the integer radius  => \n";
cin >> Radius ;

Area= PI * pow(Radius,2);
cout <<setprecision(3) <<setiosflags(ios::fixed|ios::showpoint);
cout <<setw(30)<< "\nThe area is " <<setw(20)
	 << Area << endl;

CirCumf= 2 * PI * Radius;
cout << setw(30)<<"\nThe circumference is " <<setw(11)
	 << CirCumf << endl;
cout << endl;
}