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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.  
  8.     double a, b, c;
  9.     double delta, pdelta;
  10.     double x1, x2;
  11.  
  12.     // ===== PRZYKLAD 1 =====
  13.     a = 3;
  14.     b = 4;
  15.     c = 5;
  16.  
  17.     cout << "Przyklad 1: 3x^2 + 4x + 5 = 0" << endl;
  18.  
  19.     delta = b*b - 4*a*c;
  20.     cout << "Delta = " << delta << endl;
  21.  
  22.     if (delta > 0) {
  23.         pdelta = sqrt(delta);
  24.         x1 = (-b - pdelta) / (2*a);
  25.         x2 = (-b + pdelta) / (2*a);
  26.         cout << "x1 = " << x1 << endl;
  27.         cout << "x2 = " << x2 << endl;
  28.     }
  29.     else if (delta == 0) {
  30.         x1 = -b / (2*a);
  31.         cout << "x = " << x1 << endl;
  32.     }
  33.     else {
  34.         cout << "Brak pierwiastkow rzeczywistych" << endl;
  35.     }
  36.  
  37.     cout << endl;
  38.  
  39.     // ===== PRZYKLAD 2 =====
  40.     a = 1;
  41.     b = 10000;
  42.     c = 1;
  43.  
  44.     cout << "Przyklad 2: x^2 + 10000x + 1 = 0" << endl;
  45.  
  46.     delta = b*b - 4*a*c;
  47.     cout << "Delta = " << delta << endl;
  48.  
  49.     if (delta > 0) {
  50.         pdelta = sqrt(delta);
  51.         x1 = (-b - pdelta) / (2*a);
  52.         x2 = (-b + pdelta) / (2*a);
  53.         cout << "x1 = " << x1 << endl;
  54.         cout << "x2 = " << x2 << endl;
  55.     }
  56.     else if (delta == 0) {
  57.         x1 = -b / (2*a);
  58.         cout << "x = " << x1 << endl;
  59.     }
  60.     else {
  61.         cout << "Brak pierwiastkow rzeczywistych" << endl;
  62.     }
  63.  
  64.     return 0;
  65. }
  66.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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Przyklad 1: 3x^2 + 4x + 5 = 0
Delta = -44
Brak pierwiastkow rzeczywistych

Przyklad 2: x^2 + 10000x + 1 = 0
Delta = 1e+08
x1 = -10000
x2 = -0.0001
https://ideone.com/r7XkpE
language:
C++ (gcc 8.3)
created:
12 hours ago
visibility:
public

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