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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     double a;
  8.     double b;
  9.     double c;
  10.     cin >> a >> b >> c;
  11.     double delta = (b * b) - 4 * a * c;
  12.     if (delta > 0) {
  13.         cout << "x1 =" << (-b + sqrt(delta) )/(2*a) ;
  14.         cout << "\nx2 =" << (-b - sqrt(delta) )/(2*a);
  15.     }
  16.     else if ( delta = 0 ) {
  17.         cout << -b / ( 2 * a );
  18.     }    
  19.     else {
  20.         cout << "vo nghiem";
  21.     }
  22.     return 0;
  23. }
Success #stdin #stdout 0.01s 5320KB
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vo nghiem
https://ideone.com/JDlGXZ
language:
C++ 4.3.2 (gcc-4.3.2)
created:
1 day ago
visibility:
public

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