@[xmy010424](/user/708772) 为啥我这不行，vc可以运行
by xmy010424 @ 2022-04-01 18:16:39
可以运行啊，但是你第二个答案和第三个答案位置好像反了（
by NetherDevil @ 2022-04-01 18:19:01
```
#include<bits/stdc++.h>
using namespace std;
int main()
{
double r,d,c,s,pi = 3.14159;
cin >> r;
d = 2*r;
c = pi*2*r;
s = r*r*pi;
printf("%0.4f %0.4f %0.4f",d,c,s);
return 0;
}
```
不更简单吗？？？
by SZH0523 @ 2022-08-23 11:58:08
@ [ xmy010424](https://www.luogu.com.cn/user/708772)
by SZH0523 @ 2022-08-23 12:01:18
@[fyh101123](/user/774441) jiudangmeishuo
by sheryang_TLE @ 2022-08-26 16:16:28
@[xmy010424](/user/708772)
```cpp
#include<iostream>
#include<cstdio>
using namespace std;
int n,a[105];
int main()
{
double r,d,c,s;
scanf("%lf",&r);
d=2*r;
c=3.14159*d;
s=3.14159*r*r;
printf("%.4lf %.4lf %.4lf",d,c,s);
return 0;
}
```
by BEST_CAT @ 2023-01-12 17:08:07