你康康我的：
```cpp
#include <iostream>
#include <iomanip>
using namespace std;
int main(){
double a=0.0,sum=0.0;
cin>>a;
for (int i=1;i<=a;i++){
if (i<=150)sum+=0.4463;
else if (i>150 and i<=400)sum+=0.4663;
else if (i>400)sum+=0.5663;
}
printf("%.1f",sum);
}
```
by penguin_is_cool @ 2024-01-25 11:13:15
@[xiao_tuan_zi](/user/1169273) 不用const double
by penguin_is_cool @ 2024-01-25 11:14:17