#include <stdio.h>

int main ()
{
    int h, f, i,sum;
    double t, yuxian,x, m;
    sum = 1;
    f = 2;
    printf("请输入弧度数:");
    scanf("%d", &x);

    yuxian = 0;
    t = h = 1;
    while (t >= 1e-6)
    {
        yuxian += t * h;
        for (i = 1; i <= f; i++)
        {
            sum *= i;
        }
    h *= -1;
    m = x * x;
    t = m / sum;
    f += 2;
    }
    printf("cos(%lf) = %lf\n", x, yuxian);
    return 0;

}

#include <stdio.h>
#include <math.h>
const double PI = 3.1415;
int main(void)
{
    double angle;//角
    double arc;//弧
    double sum = 0.0;//cos(arc)值
    unsigned int i = 2;//计数器
    double elements = 1.0;//当前项的值
    printf("请输入角度:");
    scanf("%lf", &angle);
    angle -=((int)angle / 360) * 360;
    arc = angle / 180 * PI;

    do
    {
        sum += elements;
        elements = elements * arc * arc * (-1);
        static unsigned int j = 2;
        while (j <= i)
        {
            elements = elements / j;
            ++j;
        }
        i += 2;
    }while (fabs(elements) >= 1e-6);
    printf("cos(%lf) = %lf\n", angle, sum);
    return 0;
}

楼上，能不能不要笑说菜鸟。。。

收到的鲜花

• 寒风中的细雨 于 2012-12-02 12:09 送鲜花  10朵   附言：什么意思呀