/* From: "COMPUTATIONAL PHYSICS, 2nd Ed" 
   by RH Landau, MJ Paez, and CC Bordeianu 
   Copyright Wiley-VCH, 2007.
   Electronic Materials copyright: R Landau, Oregon State Univ, 2007;
   MJ Paez, Univ Antioquia, 2007; and CC Bordeianu, Univ Bucharest, 2007.
   Support by National Science Foundation                              
*/
//   A2.java: Area of a circle, sample program 

public class A2 {
 
  public static void main(String[] args) {       // Begin main method
		
     double r, C, A, PI = Math.PI;         // Declare, assign doubles
		 
     r = 1.;                                              // Assign r
     C = 2.* PI* r;                        // Calculate circumference
     A= r * r * PI;                                    // Calculate A
     System.out.println("R = " + r);                        //Print r
     System.out.println("C = " + C);                       // Print C
     System.out.println("\n R = " + r +", A = " + A);  // Print R & A
  }                                                // end main method
}                                                  // end Area2 class