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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct triangle{
  5. 	int a,b,c;
  6. };
  7.  
  8. int main(void){
  9. 	double s;
  10. 	double area;
  11. 	struct triangle x={5,5,5};
  12.  
  13. 	s=(x.a+x.b+x.c)/2;
  14.     area=sqrt(s*(s-x.a)*(s-x.b)*(s-x.c));
  15.  
  16. 	printf("a:%d\n",x.a);
  17.     printf("b:%d\n",x.b);
  18.     printf("c:%d\n",x.c);
  19.     printf("三角形の面積: %f\n", area);
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0s 5324KB
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stdin
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Standard input is empty
stdout
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a:5
b:5
c:5
三角形の面積: 7.483315
https://ideone.com/5xaIyg
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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