我也刚学C
练习一下
#include"stdio.h"
double polynomial(int n)
{
    double result=0,sign=1;
    for (int i =1;i<=n;i++)
    {
        result+=sign*(1.0/i);
        sign*=-1;
    }
    return result;
}
void main()
{
    int num;
    int namount;
    scanf("%d",&namount);
    while(namount>0)
    {
        scanf("%d",&num);
        printf("%lf \n",polynomial(num) );
        namount--;
    }
}

scanf("%d", &m)
的返回直不是 1  就是 0;
而 EOF 的直是 -1;
不是死循环了吗