Lab2-Pi

JLab>java Selftest 

JLab> testPi : ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok  (10.0/10.0)
JLab> : -----------------------------
JLab> : ?????? 10.0 ????? (???? 10.0)
JLab> : -----------------------------
JLab> :<POINT>10.0</POINT> (<TOTAL>10.0</TOTAL> )
JLab>

import java.util.Scanner;

public class Pi {
  // pi1 = 4*(1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + ...)
  // pi2 = 4*(2/3 * 4/3 * 4/5 * 6/5 * 6/7 * 8/7 * ...)
  public static void main(String[] args) {
    Scanner kb = new Scanner(System.in);
    System.out.print("k = ");
    int k = kb.nextInt();
    int a=1,m=1,n=1;
    double pi1 = 0, pi2 = 0,sum=0,koon=1;
    while (m <= k) {
      a = a * (-1);
      sum = sum - ((1.0 / (2.0*m - 1.0)) *( a));
      m=m+1;
      }
      pi1 = pi1 + (4 * sum);
      while (n <= k) {
        if (n % 2 == 0) {
          koon = koon * (1.0 + (1.0 / (n + 1.0)));
          }
          else {
            koon = koon * (1.0 - (1.0 / (n + 2.0)));
            }
            n = n + 1;
            }
            pi2 = pi2 + (koon * 4);
      
    
    
    System.out.println("Pi = " + pi1);  // แสดงผลของสูตรแรก
    System.out.println("Pi = " + pi2);  // แสดงผลของสูตรที่สอง
  }

}

SM=1, CM=28, ST=36, KY=321, TR=60:00
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;
ERR = 60:00 ;