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  1. #include <stdio.h>
  2. #include <math.h>
  3. typedef struct{
  4. 	double a;
  5. 	double b;
  6. 	double c;
  7. }masa;
  8.  
  9. int main(void){
  10. 	masa t;
  11. 	double s;
  12. 	double S;
  13. 	scanf("%lf",&t.a);
  14. 	scanf("%lf",&t.b);
  15. 	scanf("%lf",&t.c);
  16. 	s=(t.a+t.b+t.c)/2.0;
  17. 	S=sqrt(s*(s-t.a)*(s-t.b)*(s-t.c));
  18. 	printf("a:%.0f\n", t.a);
  19. 	printf("b:%.0f\n", t.b);
  20. 	printf("c:%.0f\n", t.c);
  21. 	printf("三角形の面積:%lf\n", S);
  22.     return 0;
  23. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin 
5
5
5
stdout 
a:5
b:5
c:5
三角形の面積:10.825318
https://ideone.com/N7sSKg
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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