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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int hankei;
  5. 	double S,L;
  6. 	scanf("%d", &hankei);
  7. 	S=3.14*hankei*hankei;
  8. 	L=hankei*2*3.14;
  9. 	printf("%.5f\n", S);
  10. 	printf("%.3f\n", L);
  11. 	return 0;
  12. }
  13.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/QUNYM6
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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