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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.         double a, x, y,r;
  7.     cin >> a >> x >> y >> r;
  8.  
  9.     cout << 4 * a << " " << a * a << endl;
  10.     cout << 2 * (x + y) << " " << x * y  << endl;
  11.  
  12.     double pi = acos(-1);
  13.  
  14.     cout << fixed << setprecision(2)
  15.          << 2 * pi * r << " "
  16.          << pi * r * r;
  17.  
  18.     return 0;
  19. }
Success #stdin #stdout 0s 5316KB
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stdin
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Standard input is empty
stdout
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0 0
1.86619e-309 0
0.00 0.00
https://ideone.com/ksLhRT
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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