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  1. #include <stdio.h>
  2. #include<math.h>
  3.  
  4. struct triangle{
  5. 	double a;
  6. 	double b;
  7. 	double c;
  8. };
  9.  
  10. int main(void) {
  11. 	struct triangle z = {5,5,5};
  12. 	double o,s;
  13.  
  14. 	o=(z.a+z.b+z.c)/2.0;
  15. 	s=sqrt(o*(o-z.a)*(o-z.b)*(o-z.c));
  16.  
  17. 	printf("自身で入力した３辺の長さは%.3f,%.3f,%.3f",z.a,z.b,z.c);
  18. 	printf("\n");
  19. 	printf("面積は%lf",s);
  20.  
  21.  
  22.  
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
Standard input is empty
stdout 
自身で入力した３辺の長さは5.000,5.000,5.000
面積は10.825318
https://ideone.com/bIoJH5
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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