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  1. #include <iostream>
  2. #include <cmath>
  3. #include <iomanip>
  4. #include <algorithm>
  5.  
  6. using namespace std;
  7.  
  8. int main() {
  9.     ios_base::sync_with_stdio(false);
  10.     cin.tie(NULL);
  11.  
  12.     double a, b, c;
  13.     if (cin >> a >> b >> c) {
  14.         double delta = b * b - 4 * a * c;
  15.         if (delta < 0) delta = 0; //có thể có sai số nhỏ khiến delta âm
  16.  
  17.         double x1 = (-b - sqrt(delta)) / (2 * a);
  18.         double x2 = (-b + sqrt(delta)) / (2 * a);
  19.  
  20.         if (x1 > x2) {
  21.             swap(x1, x2);
  22.         }
  23.  
  24.         cout << fixed << setprecision(6) << x1 << " " << x2 << "\n";
  25.     }
  26.  
  27.     return 0;
  28. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/1r8BpP
language:
C++ (gcc 8.3)
created:
6 hours ago
visibility:
secret

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