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  1. #include <stdio.h>
  2. #define PI 3.14159
  3. int main(void) {
  4. 	// your code goes here
  5. 	double r;
  6. 	printf("Input r:");
  7. 	scanf("%lf",&r);
  8. 	printf("circumference=%f\n",2*PI*r);
  9. 	printf("area=%f\n",PI*r*r);
  10.  
  11.  
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5324KB
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stdout
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Input r:circumference=12.566360
area=12.566360
https://ideone.com/2RVmML
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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