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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.     float a = 5;
  8.     float b = 4;
  9.     float c = 2;
  10.  
  11.     float delta;
  12.     float pdelta;
  13.     float x1, x2;
  14.  
  15.     cout << "a = " << a << ", b = " << b << ", c = " << c << endl;
  16.  
  17.     // delta
  18.     delta = b * b - 4 * a * c;
  19.     cout << "Delta = " << delta << endl;
  20.  
  21.     if (delta > 0) {
  22.         // pierwiastek z delty
  23.         pdelta = sqrt(delta);
  24.         cout << "Pierwiastek delty = " << pdelta << endl;
  25.  
  26.         // x1 z algorytmu delty
  27.         x1 = (-b - pdelta) / (2 * a);
  28.  
  29.         // x2 ze wzoru Vieta
  30.         x2 = -c / (a * x1);
  31.  
  32.         cout << "x1 (delta) = " << x1 << endl;
  33.         cout << "x2 (Vieta) = " << x2 << endl;
  34.     }
  35.     else if (delta == 0) {
  36.         x1 = -b / (2 * a);
  37.         cout << "Jedno rozwiazanie: x = " << x1 << endl;
  38.     }
  39.     else {
  40.         cout << "Brak rozwiazan rzeczywistych" << endl;
  41.     }
  42.  
  43.     return 0;
  44. }
Success #stdin #stdout 0s 5328KB
comments (?)
stdin 
Standard input is empty
stdout 
a = 5, b = 4, c = 2
Delta = -24
Brak rozwiazan rzeczywistych
https://ideone.com/Jgj7GN
language:
C++ (gcc 8.3)
created:
11 hours ago
visibility:
public

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