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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct tri{
  5.  
  6. 	double a,b,c;
  7.  
  8. };
  9.  
  10. int main(void) {
  11.  
  12. 	struct tri x;
  13. 	scanf("%lf %lf %lf",&x.a,&x.b,&x.c);
  14.  
  15. 	double p=(x.a+x.b+x.c)/2;
  16. 	double s = sqrt(p*(p-x.a)*(p-x.b)*(p-x.c));
  17.  
  18. 	printf("a= %.1lf\n",x.a);
  19. 	printf("b= %.1lf\n",x.b);
  20. 	printf("c= %.1lf\n",x.c);
  21. 	printf("三角形の面積：%lf",s);
  22.  
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
5 5 5
stdout 
a= 5.0
b= 5.0
c= 5.0
三角形の面積：10.825318
https://ideone.com/y2585d
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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