package mypackage;public class Pi {  public static void main(String[] args) {          int ARRSIZE=103, DISPCNT=100; //定義數組大小，顯示位數       int [] x=  new int [ARRSIZE];//x[0] x[1] . x[2] x[3] x[4] .... x[ARRSIZE-1]      int [] z = new int [ARRSIZE];       int a=1, b=3, c, d,   Cnt=0;        x[1] = 2;       z[1] = 2;       while( (++Cnt<20000))       { d = 0;         for(int i=ARRSIZE-1; i>0; i--)//z*=a;         {           c = z[i]*a + d;           z[i] = c%10;           d = c / 10;         }         d = 0;         for(int i=0; i<ARRSIZE; i++)//z/=b;         {           c = z[i]+d*10;           z[i] = c/b;           d = c % b;         }      for(int i=ARRSIZE-1; i>0; i--)//x+=z;         {           c = x[i] + z[i];           x[i] = c%10;           x[i-1] += c/10;          }         a++;         b+=2;       }System.out .print("pi="+x[0]+(x[1])+".") ;       for(int i=0; i<DISPCNT; i++)       {         if ((i%100)==0){System.out.println() ;}if(i>4&&i%5==0){System.out.print(",") ;}         System.out.print(x[i+2]) ;    }}}