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  1. #include <stdio.h>
  2.  
  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*3.14159*r);
  9. 	printf("area=%f\n",3.14159*r*r);
  10. 	return 0;
  11. }
  12.  
Success #stdin #stdout 0s 5292KB
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stdout
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Input r:circumference=6.283180
area=3.141590
https://ideone.com/KPOTip
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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