c 语言求派的近似值

以下是C语言求π的近似值的代码和流程图：

#include <stdio.h>
#include <math.h>

int main() {
    int sign = 1; // 正负1变换
    double pi = 0.0, n = 1.0, term = 1.0; // 定义初始化π，等式右边的每一项
    while (fabs(term) > 0.000001) {
        pi = pi + term;
        n = n + 2;
        sign = -sign;
        term = sign / n;
    }
    pi = pi * 4;
    printf("pi=%10.8f\n", pi);
    return 0;
}

流程图如下：

开始
sign = 1, pi = 0.0, n = 1.0, term = 1.0
while(fabs(term) > 0.000001) {
    pi = pi + term;
    n = n + 2;
    sign = -sign;
    term = sign / n;
}
pi = pi * 4;
输出 pi
结束