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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.     double x;
  8.     const double eps = 1e-6; // dokładność
  9.  
  10.     cout << "Podaj liczbe rzeczywista > 1: ";
  11.     cin >> x;
  12.  
  13.     if (x <= 1) {
  14.         cout << "Liczba musi byc wieksza od 1." << endl;
  15.         return 1;
  16.     }
  17.  
  18.     double left = 1.0;
  19.     double right = x;
  20.     double mid;
  21.  
  22.     while (right - left > eps) {
  23.         mid = (left + right) / 2.0;
  24.  
  25.         if (mid * mid > x)
  26.             right = mid;
  27.         else
  28.             left = mid;
  29.     }
  30.  
  31.     cout << "Przyblizona wartosc pierwiastka: "
  32.          << (left + right) / 2.0 << endl;
  33.  
  34.     return 0;
  35. }
  36.  
Success #stdin #stdout 0.01s 5292KB
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Podaj liczbe rzeczywista > 1: Przyblizona wartosc pierwiastka: 7.4162
https://ideone.com/g6r850
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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