C语言程序C语言程序

Question

求sin函数的值，要求最后一项的绝对值小于十的负五次方，求实数绝对值的数学库函数为fabs

Answer 1

运行结果：

代码：

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <math.h>

double jc(int n)
{
    double s = 1;
    int i = 1;
    for (i = 1; i <= n; i++)
        s *= i;
    return s;
}

int main()
{
    double x, sx =0;
    int flag = 1;
    int i = 1;
    double fz, fm = 1, v;
    scanf("%lf", &x);
    fz = x;
    v = fz / fm;

    while (fabs(v) >= 1e-5)
    {
        sx += flag * v;
        i += 2;
        fz = pow(x, i);
        fm = jc(i);
        flag = -flag;
        v = fz / fm;
    }

    printf("%lf", sx);

    return 0;
}