#include <iostream>
#include <cmath>
 
using namespace std;
 
double pif(double); //Fucntion to determine value of pi
int term; //Variable to count terms
 
int main()
{
	cout << "Value of Pi" << "		" << "Number of terms" << endl;
 
	cout << pif(3.0) << "			" << term << endl;
	cout << pif(3.1) << "			" << term << endl;
	cout << pif(3.14) << "			" << term << endl;
	cout << pif(3.141) << "			" << term << endl;
	cout << pif(3.1415) << "			" << term << endl;
	cout << pif(3.14159) << "			" << term << endl;
 
	return 0;
}
 
double pif(double n)
{
	double pi = 0.0; //Variable to store value of pi
	int sign = 1; //Variable to store sign
	bool check = false; //Variable to check value of pi
 
	term = 0;
 
	while (!check)
	{
		if (pi * 4.0 >= n) //If value of pi is greater than or equal to approx of pi
			check = true; //Then exit the loop
		else
		{
			pi *= sign * (1.0 / (1.0 + term * 2.0)); //Otherwise calculate value of pi
			sign *= -1; //Change sign
			++term; //And increment term
		}
	}
 
	pi *= 4.0; //Perform final pi calculation after fractional sums have been determined
 
	return pi;
}

#include <stdio.h>
 
int main()
{
      double pi;
      double divisor;
 
      int term;
      term = 0;
      divisor = 3.0;
      pi = 4.0
 
 
    for ( ; 1750 > term; term++) 
 /* You can change the "1750" to whatever. That is just how many terms I wanted to show*/ 
 
     {
        divisor = ( 2 * term) + 3.0;
 
          if (term % 2 == 0)
           {
               pi = pi - 4.0 / divisor
            }
 
          else
            {
               pi = pi + 4.0 / divisor;
             }
 
     printf("%lf term%d\n", pi, term);
 
            }
 
               system("pause")  /* I know that's bad but I can get it to stop automatically yet*/
 
return 0;
}