testsAndMisc/CPP/miscelanious/Pi/main.cpp

#include <math.h>
#include <iostream>
#include <iomanip>

const unsigned long long int ITERATIONS = 10000;

long double getPi()
{
	long double pi = 4;
	bool negative = 1;
	for(unsigned int i = 3; i < ITERATIONS; i += 2)
	{
		if(negative) pi -= 4.0 / i;
		else pi += 4.0 / i;
		negative = !negative;
	}
	std::cout << std::setprecision(2000) << pi << std::endl;
	return pi;
}

int main()
{
	getPi();
	return 0;
}