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  1. #include <stdio.h>
  2. #define PI 3.14159
  3. int main() {
  4.     float radius, area;
  5.     printf("Enter the radius: ");
  6.     scanf("%f", &radius);
  7.     area = PI * radius * radius;
  8.     printf("Area of circle = %.2f\n", area);
  9.     return 0;
  10. }
Success #stdin #stdout 0.01s 5316KB
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stdin
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Standard input is empty
stdout
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Enter the radius: Area of circle = 0.00
https://ideone.com/K34ip8
language:
C (gcc 8.3)
created:
15 hours ago
visibility:
public

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