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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. 	struct TRI{
  5. 		double a;
  6. 		double b;
  7. 		double c;
  8. 	}data;
  9. 	int main(void){
  10. 		scanf("%lf,%lf,%lf",&data.a,&data.b,&data.c);
  11. 		double p=(data.a+data.b+data.c)/2;
  12. 		double s=sqrt(p*(p-data.a)*(p-data.b)*(p-data.c));
  13.  
  14. 		printf("a:%g\n",data.a);
  15. 		printf("b:%g\n",data.b);
  16. 		printf("c:%g\n",data.c);
  17. 		printf("三角形の面積:%lf",s);
  18.  
  19.  
  20. 	return 0;
  21. }
  22.  
Success #stdin #stdout 0s 5216KB
comments (?)
stdin 
5,5,5
stdout 
a:5
b:5
c:5
三角形の面積:10.825318
https://ideone.com/Tuxbo3
language:
C99 (gcc 8.3)
created:
11 days ago
visibility:
public

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