#include"stdio.h"#include"string.h"#include"conio.h"#include"windows.h"#include"math.h"double funa (int n);int main(){?double u;?int y;?printf("請輸入分母的值:");scanf("%d",&y);?u = funa ( y );?printf("? %f \n",u);?return 0;}double funa (int n){?double add = 0;?double t;?int k;?int s = 1;?for ( k = 1;k <= n; k ++ )?{??s = -s;??t = s * 1.0/k;??add = add + t;?}??return add;}