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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.   const double pi = 3.1415926535897932384626433832795;
  8.   int r;
  9.   cin >> r;
  10.   printf("%5.3f \n%5.3f", pi * r * r, 2 * pi * r);
  11.   return 0;
  12. }
Success #stdin #stdout 0s 15232KB
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https://ideone.com/DIGvo2
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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