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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. struct side {
  5.     double a;
  6.     double b;
  7.     double c;
  8. };
  9.  
  10. int main(void) {
  11.     struct side t;
  12.     double s; 
  13.     double S;
  14.  
  15. 	t.a = 3;
  16. 	t.b = 4;
  17. 	t.c = 5;
  18.  
  19.     s = (t.a + t.b + t.c) / 2.0;
  20.     S = sqrt(s * (s - t.a) * (s - t.b) * (s - t.c));
  21.  
  22.     printf("面積は %lf です", S);
  23.  
  24.     return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5320KB
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Standard input is empty
stdout
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面積は 6.000000 です
https://ideone.com/lSpDw4
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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