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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct triangle{
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8. };
  9.  
  10. int main(void) {
  11. 	struct triangle t;
  12.     scanf("%lf",&t.a);
  13.     scanf("%lf",&t.b);
  14.     scanf("%lf",&t.c);
  15.  
  16. 	double s,h;
  17. 	s=(t.a+t.b+t.c)/2;
  18. 	h=sqrt(s*(s-t.a)*(s-t.b)*(s-t.c));
  19.  
  20. 	printf("a:%lf\n",t.a);
  21. 	printf("b:%lf\n",t.b);
  22. 	printf("c:%lf\n",t.c);
  23. 	printf("三角形の面積:%lf\n",h);
  24.  
  25. 	return 0;
  26. }
  27.  
Success #stdin #stdout 0.01s 5308KB
comments (?)
stdin 
5
5
5
stdout 
a:5.000000
b:5.000000
c:5.000000
三角形の面積:10.825318
https://ideone.com/mNFRqH
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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