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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. double f(double x) {
  6.     return x*x*x - x - 2;
  7. }
  8.  
  9. int main() {
  10.     double a, b, c;
  11.     double eps = 1e-6;
  12.  
  13.     cin >> a >> b;
  14.  
  15.     if (f(a) * f(b) >= 0) {
  16.         cout << "Zly przedzial";
  17.         return 0;
  18.     }
  19.  
  20.     while ((b - a) > eps) {
  21.         c = (a + b) / 2;
  22.         if (f(a) * f(c) < 0)
  23.             b = c;
  24.         else
  25.             a = c;
  26.     }
  27.  
  28.     cout << (a + b) / 2;
  29.     return 0;
  30. }
Success #stdin #stdout 0.01s 5304KB
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https://ideone.com/sTK2Wn
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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