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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. } t;
  9.  
  10. int main(void) {
  11. 	double a,b,c;
  12. 	scanf("%lf",&t.a);
  13. 	scanf("%lf",&t.b);
  14. 	scanf("%lf",&t.c);
  15. 	double s = (t.a+t.b+t.c)/2;
  16. 	double area;
  17. 	area = s*(s-t.a)*(s-t.b)*(s-t.c);
  18. 	area = sqrt(area);
  19. 	printf("a=%lf\n",t.a);
  20. 	printf("b=%lf\n",t.b);
  21. 	printf("c=%lf\n",t.c);
  22. 	printf("三角形の面積：%lf",area);
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
3
4
5
stdout 
a=3.000000
b=4.000000
c=5.000000
三角形の面積：6.000000
https://ideone.com/0r5Pmt
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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