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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4.  
  5. struct student{
  6. 	double a;
  7. 	double b;
  8. 	double c;
  9. }d;
  10. int main(void) {
  11. 	scanf("%lf",&d.a);
  12. 	scanf("%lf",&d.b);
  13. 	scanf("%lf",&d.c);
  14. 	double k;
  15.  
  16. 	double m=(d.a+d.b+d.c)/2;
  17.     k = sqrt(m*(m-d.a)*(m-d.b)*(m-d.c));
  18.     printf("a:%.f\n",d.a);
  19.     printf("b:%.f\n",d.b);
  20.     printf("c:%.f\n",d.c);
  21.     printf("面積 = %lf", k);
  22.  
  23. 	return 0;
  24. }
  25.  
  26.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
5
5
5
stdout 
a:5
b:5
c:5
面積 = 10.825318
https://ideone.com/krEhw3
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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