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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. }data;
  9. int main(void) {
  10.  
  11.  
  12. 	scanf("%lf",&data.a);
  13. 	scanf("%lf",&data.b);
  14. 	scanf("%lf",&data.c);
  15. 	double s,p;
  16. 	p=(data.a+data.b+data.c)/2;
  17. 	s=sqrt(p*(p-data.a)*(p-data.b)*(p-data.c));
  18. 	printf("a:%lf\n",data.a);
  19. 	printf("b:%lf\n",data.b);
  20. 	printf("c:%lf\n",data.c);
  21. 	printf("三角形の面積:%lf\n",s);
  22.  
  23. 	return 0;
  24. }
  25.  
  26.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin 
3
4
5
stdout 
a:3.000000
b:4.000000
c:5.000000
三角形の面積:6.000000
https://ideone.com/3qX0O8
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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