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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct side {
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8. };
  9.  
  10.  
  11.  
  12. int main(void) {
  13.  
  14. 	struct side t = {5,5,5};
  15. 	printf("a:%lf\nb:%lf\nc:%lf\n" ,t.a,t.b,t.c);
  16. 	double s,S;
  17. 	s = (t.a+t.b+t.c)/2;
  18. 	S = sqrt(s*(s-t.a)*(s-t.b)*(s-t.c));
  19.  
  20. 	printf("三角形の面積:%lf" ,S);
  21.  
  22.  
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 5272KB
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stdin
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Standard input is empty
stdout
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a:5.000000
b:5.000000
c:5.000000
三角形の面積:10.825318
https://ideone.com/zVaLcz
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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