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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. // Definicja funkcji
  7. double f(double x)
  8. {
  9.     return x * x * x - x - 2;   // f(x) = x^3 - x - 2
  10. }
  11.  
  12. int main()
  13. {
  14.     double a, b, c;
  15.     double eps = 1e-6;
  16.  
  17.     cin >> a >> b;
  18.  
  19.     if (f(a) * f(b) >= 0)
  20.     {
  21.         cout << "Brak miejsca zerowego w przedziale";
  22.         return 0;
  23.     }
  24.  
  25.     while (fabs(b - a) > eps)
  26.     {
  27.         c = (a + b) / 2;
  28.  
  29.         if (f(c) == 0.0)
  30.             break;
  31.         else if (f(a) * f(c) < 0)
  32.             b = c;
  33.         else
  34.             a = c;
  35.     }
  36.  
  37.     cout << c;
  38.  
  39.     return 0;
  40. }
  41.  
Success #stdin #stdout 0s 5268KB
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https://ideone.com/bIJUJC
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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