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B2014 与圆相关的计算

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Baoshuo Ren 2021-07-15 19:12:52 +08:00 committed by Baoshuo Ren
parent 76418f4188
commit 66eb0168ba
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 14 additions and 0 deletions
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Luogu/problem/B2014/B2014.cpp Normal file
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#include <bits/stdc++.h>
using namespace std;
const double pi = 3.14159;
int main() {
double r;
cin >> r;
cout << fixed << setprecision(4) << 2 * r << ' '
<< fixed << setprecision(4) << 2 * pi * r << ' '
<< fixed << setprecision(4) << pi * r * r << endl;
return 0;
}