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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct triangle{
  5. 	int a;
  6. 	int b;
  7. 	int c;
  8. };
  9.  
  10. int main(void){
  11. 	double p,s;
  12. 	struct triangle v;
  13. 	scanf("%d",&v.a);
  14. 	scanf("%d",&v.b);
  15. 	scanf("%d",&v.c);
  16. 	printf("a:%d\n",v.a);
  17. 	printf("b:%d\n",v.b);
  18. 	printf("c:%d\n",v.c);
  19. 	p=(v.a+v.b+v.c)/2;
  20. 	printf("ba:%d\n",p-v.a);
  21. 	printf("bb:%d\n",p-v.b);
  22. 	printf("bc:%d\n",p-v.c);
  23. 	s=sqrt(p*(p-v.a)*(p-v.b)*(p-v.c));
  24. 	if(s==0){
  25. 		printf("その三角形は存在しません。");
  26. 	}else{
  27. 	printf("三角形の面積:%lf",s);
  28. 	return 0;
  29. 	}
  30. }
  31.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
5
4
2
stdout 
a:5
b:4
c:2
ba:5
bb:0
bc:0
その三角形は存在しません。
https://ideone.com/0Dehno
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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