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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct hen {
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8.  
  9. }sankaku;
  10.  
  11. int main(void) {
  12. 	double s,S;
  13.  
  14. 	scanf("%lf",&sankaku.a);
  15. 	scanf("%lf",&sankaku.b);
  16. 	scanf("%lf",&sankaku.c);
  17.  
  18. 	s = (sankaku.a+sankaku.b+sankaku.c)/2.0;
  19.  
  20. 	S = sqrt(s*(s-sankaku.a)*(s-sankaku.b)*(s-sankaku.c));
  21.  
  22. 	printf("辺aの長さは%lf\n",sankaku.a);
  23. 	printf("辺bの長さは%lf\n",sankaku.b);
  24. 	printf("辺cの長さは%lf\n",sankaku.c);
  25. 	printf("ヘロンの公式より面積は%lf\n",S);
  26.  
  27. 	return 0;
  28. }
  29.  
  30.  
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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辺aの長さは0.000000
辺bの長さは0.000000
辺cの長さは0.000000
ヘロンの公式より面積は0.000000
https://ideone.com/5TOa6q
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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