@[cuphead_P](/user/731197) 应该是 ```4.0/3``` 不是4/3
by qwertyuiop951357 @ 2024-04-16 22:25:41
```cpp
#include<bits/stdc++.h>
using namespace std;
const double pai=3.141593;
const double n=5.0;
int main(){
cout<<n*2*pai<<'\n'<<pai*n*n<<'\n'<<1.0*4/3*n*n*n*pai<<'\n';
return 0;
}
```
by 3_14 @ 2024-04-16 22:27:30
谢谢
by cuphead_P @ 2024-04-17 21:14:46