@[fanbole](/user/1119861) 所以你代码呢？
by NullPointerExpection @ 2024-06-29 16:29:02
这样即可。
```
#include<iostream>
using namespace std;
int main()
{
double s,ans=1,m=2;
cin>>s;
for(double i=2;i<s;i=i+m)
{
m=m*0.98;
ans++;
}
cout<<ans;
return 0;
}
```
by sutiancheng @ 2024-06-29 16:30:55
不是将距离*0.98……
by sutiancheng @ 2024-06-29 16:31:42
```c
#include<bits/stdc++.h>
using namespace std;
int main(){
double n,b = 2,l = 0;
cin>>n;
while(n>0){
n-=b;
b*=0.98;
l++;
}
cout<<l;
return 0;
}
```
by libohan356218 @ 2024-06-29 16:32:09
```c
#include<bits/stdc++.h>
using namespace std;
int main(){
double s,d=0,a=2;
int i=1;
cin>>s;
d+=2;
while(d<s){
a*=0.98;
d+=a;
i++;
}
cout<<i;
return 0;
}
```
@[NullPointerExpection](/user/1360496)
by fanbole @ 2024-06-29 16:36:59
@[fanbole](/user/1119861)
```c
#include<bits/stdc++.h>
using namespace std;
int main(){
double s,d=0,a=2;
int i=0;//i初始为零
cin>>s;
while(d<s){
d+=a;
i++;
a*=0.98;//double类型
}
cout<<i;
return 0;
}
```
求关
by libohan356218 @ 2024-06-29 16:37:21
@[NullPointerExpection](/user/1360496)
代码评测里可以看到
by libohan356218 @ 2024-06-29 16:38:22