题目描述

计算圆周率

算法1

(无穷级数)

π = 1/4 - 3/4 + 5/4 - 7/4 …

参考文献

https://blog.csdn.net/weixin_46121540/article/details/132187113

C++ 代码

#include <iostream>
#include <cstdio>
#include <cmath>

using namespace std;

int main(){
    float pi = 0, s = 1, n = 1, r = 4/n;

    while (fabs(r) > 1e-6){
        pi += r;
        n += 2;
        s = -s;
        r = 4/n * s;
    }

    printf("pi = %lf\n", pi);

    return 0;
}