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  1. #include <stdio.h>
  2. #include <math.h>
  3. 	struct data{
  4. 		double a;
  5. 		double b;
  6. 		double c;
  7. 	}; 
  8. int main(void) {
  9. 	double s,v;
  10. 	 struct data g;
  11. 	scanf("%lf,%lf,%lf",&g.a,&g.b,&g.c);
  12. 	s=(g.a+g.b+g.c)/2;
  13. 	v=sqrt(s*(s-g.a)*(s-g.b)*(s-g.c));
  14.  
  15.  
  16. 	printf("s = %.2f, s = %.2f, s = %.2f\n", g.a, g.b, g.c);
  17.     printf("面積 v = %lf\n", v);
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0.01s 5284KB
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stdin
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5,5,5
stdout
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s = 5.00, s = 5.00, s = 5.00
面積 v = 10.825318
https://ideone.com/szcmYL
language:
C99 (gcc 8.3)
created:
3 days ago
visibility:
public

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