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  1. #include <stdio.h>
  2.  
  3. double S(double a, double b, double c)
  4. {
  5.     double s = (a + b + c) / 2;
  6.     double p = s * (s - a) * (s - b) * (s - c);
  7.     double S = p,  Sprev = 0;
  8.  
  9.     while (S != Sprev) Sprev = S, S = (S + p / S) / 2;
  10.     return S;
  11. }
  12.  
  13. int main(void)
  14. {
  15.     printf("%.15g\n", S(2, 2, 2));
  16.     printf("%.15g\n", S(2, 3, 3));
  17.     printf("%.15g\n", S(3, 4, 5));
  18.     printf("%.15g\n", S(5, 5, 6));
  19.  
  20.     return 0;
  21. }
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
Standard input is empty
stdout 
1.73205080756888
2.82842712474619
6
12
https://ideone.com/YCi6qe
language:
C (gcc 8.3)
created:
34 days ago
visibility:
secret

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