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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. typedef struct{
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8. }Triangle;
  9.  
  10. int main(void) {
  11. 	Triangle t;
  12. 	double s,area;
  13.  
  14. 	scanf("%lf",&t.a);
  15. 	scanf("%lf",&t.b);
  16. 	scanf("%lf",&t.c);
  17.  
  18. 	s=(t.a+t.b+t.c)/2.0;
  19. 	area=sqrt(s*(s-t.a)*(s-t.b)*(s-t.c));
  20.  
  21. 	printf("3辺の長さが%lf,%lf,%lfの三角形の面積は%lf\n",t.a,t.b,t.c,area);
  22. 	return 0;
  23.  
  24. }
  25.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
3
4
5
stdout 
3辺の長さが3.000000,4.000000,5.000000の三角形の面積は6.000000
https://ideone.com/tgVlsF
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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