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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	// your code goes here
  5. 	const double PI=3.14159;
  6. 	double r;
  7. 	scanf("%lf",&r);
  8. 	printf("circumference=%f\n",2*PI*r);
  9. 	printf("area=%f\n",PI*r*r);
  10. 	return 0;
  11. }
  12.  
  13.  
Success #stdin #stdout 0s 5320KB
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circumference=12.566360
area=12.566360
https://ideone.com/vR0hYo
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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