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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. int main(void)
  10. {
  11.     struct Triangle t;
  12.     double s;      
  13.     double temp; 
  14.     double menseki;  
  15.  
  16.     scanf("%lf",&t.a);
  17.     scanf("%lf",&t.b);
  18.     scanf("%lf",&t.c);
  19.  
  20.     s=(t.a+t.b+t.c)/2.0;
  21.     temp=s*(s-t.a)*(s-t.b)*(s-t.c);
  22.     menseki=sqrt(temp);  
  23.  
  24.     printf("a:%lf\n",t.a);
  25.     printf("b:%lf\n",t.b);
  26.     printf("c:%lf\n",t.c);
  27.     printf("三角形の面積:%lf\n",menseki);
  28.  
  29.     return 0;
  30. }
  31.  
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
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Standard input is empty
stdout
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a:0.000000
b:0.000000
c:0.000000
三角形の面積:0.000000
https://ideone.com/574uPv
language:
C (gcc 8.3)
created:
5 hours ago
visibility:
public

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