c语言 从键盘输入x的值

Question

Answer 1

1. 先求每一个独立的值，最后汇总起来做除法

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

int main()
{
    double x=0,y=0,cosx=0,e=0,fenzi=0,fenmu=0;
    printf("please input number x : ");
    scanf("%lf",&x);
    printf("\n");

    cosx = cos(x);
    e = exp(x);
    fenzi = 2 + cosx + e;

    if(x < 0)
    {
            x = -x;
    }
    else
    {
            x = x;
    }
    fenmu = x + 1.6;

    y = fenzi / fenmu;
    printf("y = %.3lf",y);

    return 0;
}