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  1. #include <stdio.h>
  2. #include <math.h>
  3. struct Triangle{
  4. 	double a,b,c;
  5. };
  6. int main(void) {
  7. 	struct Triangle t;
  8. 	double p,s;
  9. 	scanf("%lf %lf %lf",&t.a,&t.b,&t.c);
  10. 	printf("a:%lf\nb:%lf\nc:%lf\n",t.a,t.b,t.c);
  11. 	p=(t.a+t.b+t.c)/2.0;
  12. 	s=sqrt(p*(p-t.a)*(p-t.b)*(p-t.c));
  13. 	printf("三角形の面積:%lf",s);
  14. 	return 0;
  15. }
  16.  
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin
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3 4 5
stdout
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a:3.000000
b:4.000000
c:5.000000
三角形の面積:6.000000
https://ideone.com/4uz5qx
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

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