@[li_zhi_a_wei](/user/1047089) $k$ 先除会导致可能变成 $0$，导致不断减 $0$，就死循环了。
by Falling_Sakura @ 2023-08-20 14:59:20
@[FallingSakura](/user/773503) 谢谢
by li_zhi_a_wei @ 2023-08-20 15:01:42
死循环了，建议用另一个变量代替s;把s的值付给他
by zhexu_Li @ 2023-08-20 15:43:23
k是int类型的，改double吧
by glx123 @ 2023-08-20 16:05:00
@[li_zhi_a_wei](/user/1047089) 你咋做出
P2081和P5396的
by chenyuchen_1 @ 2023-08-27 15:55:45
```cpp
#include<iostream>
using namespace std;
int main()
{
int step = 0;
double distance , sum = 0 , move = 2 , factor = 0.98;
cin >> distance;
while(sum < distance){
sum = sum + move;
move = move * factor;
step++;
}
cout << step;
return 0;
}
```
by DBL_MAX @ 2024-02-10 14:53:10