#include <stdio.h>
#include <string.h>
#include <math.h>

DoBBP(double n)
{
    double digitvalue;
    double powerthing;
    
    powerthing = pow(1/16, n); 
    printf("powerthing:  %f\n", powerthing);
    digitvalue = ((4 / (8 * n + 1)) - (2 / (8 * n + 4)) - (1 / (8 * n + 5)) - (1 / (8 * n + 6)) * powerthing); 

    printf("Digit of Pi:  %f\n", digitvalue); 
}