C :

#include "stdio.h"
#include "math.h"
/**
 * 获取泰勒公式的每一项
 * @param x
 * @param n
 * @return 泰勒公式每一项
 */
double getItem(double x, int n) {
    double k = 1;
    // 计算n!
    int i;
    for (i = 1; i <= n; i++) {
        k *= i;
    }
    return pow(x, n) / k;
}
int main() {
    int flag = 1;
    int n = 1;
    double x, val = 0;
    scanf("%lf", &x);
 
    while (1) {
        double item = getItem(x, n);
        if (item < 0.00001) {
            break;
        }
        val += flag*item;
        flag = -flag;
        n+=2;
    }
    printf("sin(x)=%.3f,count=%d\n", val, (n+1)/2);
}