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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.     double radius, area, circumference;
  8.     const double PI = 3.14159;
  9.  
  10.     cout << "Enter the radius of the circle: ";
  11.     cin >> radius;
  12.  
  13.     area = PI * pow(radius, 2);
  14.     circumference = 2 * PI * radius;
  15.  
  16.     cout << "Area of the circle: " << area << endl;
  17.     cout << "Circumference of the circle: " << circumference << endl;
  18.  
  19.     return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5292KB
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stdin
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Standard input is empty
stdout
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Enter the radius of the circle: Area of the circle: 0
Circumference of the circle: 4.36862e-309
https://ideone.com/30E4an
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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