Thread: approximate PI help

hello all

my current project is a program to approximate π (<sorry: its ugly but is pi) up to 1/99
w/ the usually taylor series representation, eg (π=4x(1-1/3+1/5...etc)

so far my code is

Code:

#include<stdio.h>
#include<stdafx.h>
#include"conio.h"
#include<math.h>

int main()
{
double n;
int i=0;

  while(i<100)
  {
  n=(((-1)^i)/(2*i+1));
  i++;
  }

printf(" PI is &#37;lf (debug %d i)", n, i);
getch();
return (0);
}

which runs but my n seems to stay 0 always... i was wondering if im approaching the problem too simply (quite simple myself) or if i am screwing up somthing (possibly ^ , i tried pow(x,x) config but that ran me into syntax.... anyways thank you for help in advance.