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  1. /* 円周と面積 */
  2. // kuroki ryuma
  3. #include <stdio.h>
  4. #define PI 3.14159
  5. int main(void){
  6.     	int r;
  7. 		float l,s;
  8. 		r=10;
  9. 		l=2*PI*r;
  10. 		s=PI*r*r;
  11. 		printf("円周=%f\t面積=%f\n",l,s);
  12. 		return 0;
  13. }
Success #stdin #stdout 0s 4392KB
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円周=62.831799	面積=314.158997
https://ideone.com/DfiGH4
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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