测试结果为什么会出现这种情况呢，怎么改啊

Question

 

Answer 1

double fun(int n)
{
	double s = 0;
	int x = 0;
	for (int i = 1; i <= n; i++)
	{
		x += i;
		s += 1.0 / x;
	}
	return s;
}

int main()
{
	int n;
	scanf_s("%d", &n);
	double s = fun(n) * 1000000;
	if (s-(int)s > 0)
		s++;
	s = (int)s / 1000000.0; 
	printf("s=%6lf", s);

	return 0;
}