generate pi ( dartboard method )

#include "pch.h"    // default
#include <random>   // for random
#include <math.h>   // for sqrt
#include <iostream> // output

double radius = 500;

int random_int(int min, int max)    // pesudo random
{
    std::random_device seeder;
    std::mt19937 engine(seeder());
    std::uniform_int_distribution<int> dist(min, max);
    return dist(engine);
}

int main()
{
    // variables
    int total_dots = 0;
    int dots_in = 0;
    double pi = 0;

    while (1)   // loop
    {
        for (int i = 0; i < 10000; i++) // do 10,000 times before refreshing console output
        {
            double point_x = (double)(random_int(radius*-1, radius));
            double point_y = (double)(random_int(radius*-1, radius));

            total_dots++;               // add onto total dots (in our invisible drawing)

            if (point_x < 0)            // make points positive to deal w/ errors
                point_x *= -1;
            if (point_y < 0)
                point_y *= -1;

                                        // pythagorean theorem
            double distance = sqrt(point_x * point_x + point_y * point_y);

            if (distance < radius)
                dots_in++;
        }

        pi = 4 * (double(dots_in) / double(total_dots));
        std::cout << pi << std::endl;
    }
}