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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     float radius, area;
  6.     const float PI = 3.14;
  7.  
  8.     cout << "Enter the radius of the circle: ";
  9.     cin >> radius;
  10.  
  11.     area = PI * radius * radius;
  12.  
  13.     cout << "Area of the circle = " << area;
  14.  
  15.     return 0;
  16. }
Success #stdin #stdout 0s 5308KB
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Enter the radius of the circle: Area of the circle = 153.86
https://ideone.com/DXTuXB
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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