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  1. #include <stdio.h>
  2.  
  3. const double PI = 3.14; //変更不可能なグローバル関数
  4.  
  5. double circum_length(double r){
  6. 	return 2.0*PI*r;
  7. }
  8.  
  9. double area(double r){
  10. 	return PI*r*r;
  11. }
  12.  
  13. int main(void) {
  14. 	double r;
  15. 	scanf("%lf", &r);
  16.  
  17. 	printf("円周の長さは%f\n", circum_length(r));
  18. 	printf("円の面積は%f\n",area(r));
  19.  
  20.  
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 5320KB
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円周の長さは37.680000
円の面積は113.040000
https://ideone.com/VHpVeV
n乗
language:
C (gcc 8.3)
created:
5 hours ago
visibility:
public

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