/* 5(b) W.A.P. to find the value PI using series : PI = sqrt(6/12+6/22+ . . . ) to a given accuracy. */

#include<stdio.h>
#include<math.h>
void main()
{
    float pi=0.0,temp=0.0,acc,term=2.0,sum=6.0;
    clrscr();
    printf("Enter the accuracy value : ");
    scanf("%f",&acc);
    pi=sqrt(sum);
    while ((fabs(temp-pi))>acc)
    {
        temp=pi;
        sum+=6.0/(term*term);
        pi=sqrt(sum);
        term+=1.0;
    }
    printf("\n\nPi value is %f\nCounter = %.0f",pi,term-1);
    getch();
}