灵感来自群星。Ideas from Stellaris

The Ragged Astronauts 衣衫褴褛的宇航员–Bob Shaw
..

计算圆周率pi:

import math
print(math.pi)
//java:
public class PiExample {
    public static void main(String[] args) {
        double pi = Math.PI;
        System.out.println(pi);
    }
}
//cpp
#include <iostream>
#include <cmath>

int main() {
    double pi = M_PI;
    std::cout << pi << std::endl;
    return 0;
}
//go
package main

import (
    "fmt"
    "math"
)

func main() {
    pi := math.Pi
    fmt.Println(pi)
}

用定义和算法无限精度算：

import decimal

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)

def calculate_pi(precision):
    decimal.getcontext().prec = precision + 1
    C = 426880 * decimal.Decimal(10005).sqrt()
    M = 1
    X = 1
    L = 13591409
    S = L
    K = 6

    for i in range(1, M + 1):
        L += 545140134
        X *= -262537412640768000
        S += decimal.Decimal(L) / (X * decimal.Decimal(K)**3 * factorial(6 * i - 5) * factorial(3 * i - 1) * factorial(i - 1)**3)
        K += 12

    pi = C / S
    return pi

# Calculate pi to 1000 bits (approximately 301 decimal digits)
precision = 1000
pi = calculate_pi(precision)
print(pi)
3.1415926535897342088071648992517339094366415814092695216334519228279645220934824617495589345466065161762422675733824763756611005780957875259350228243618937937932636064196598777396490078630438594759091325774894698735124695168755411107870365528604119304010923102883311329102658365589274953066255766800442427845268635960973661364425287493232538936493209758652372806600644924826626849247995856536361313789984684255969686734080563880080863391156477104428935300831725329769576724019186601486917207191187672724759595881158374602133713911606566143555418146394769803170189746196778572344239084132039726433483227305632572114484277622527273686768076249042504935550500092257951763786313988472749939591660922432392227178571247760101481365965530140240011973852344274603994830602772053282230303828048383643065414806987286423246318179377646381766439242691435409297726779091968886720470492896679485130478759562344751401569584712730372259693866245705552655198157393998778845515515828702098706554032687426196701387773736

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