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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct nagasa{
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8. };
  9.  
  10. int main(void) {
  11. 	struct nagasa heron;
  12. 	double s,S;
  13.  
  14. 	scanf("%lf",&heron.a);
  15. 	scanf("%lf",&heron.b);
  16. 	scanf("%lf",&heron.c);
  17.  
  18. 	s=(heron.a+heron.b+heron.c)/2.0;
  19.  
  20. 	S=sqrt(s*(s-heron.a)*(s-heron.b)*(s-heron.c));
  21.  
  22. 	printf("a:%.0f\nb:%.0f\nc:%.0f\n",heron.a,heron.b,heron.c);
  23. 	printf("三角形の面積:%f",S);
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
5
5
5
stdout 
a:5
b:5
c:5
三角形の面積:10.825318
https://ideone.com/76qTqv
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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