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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double a, b, c;
  7. 	std::cin >> a >> b >> c;
  8. 	if (a == 0 && b == 0 && c != 0)
  9. 	{
  10. 		std::cout << "Non-quadratic equation\nNo solutions";
  11. 	}
  12. 	else if  (a == 0 && b != 0 && c != 0)
  13. 	{
  14. 		double x = -c/b;
  15. 		std::cout << "Non-quadratic equation\nOne solution: " << x;
  16. 	}
  17. 	else if  (b == 0 && a != 0 && c != 0)
  18. 	{
  19. 		int D = b*b - 4*a*c;
  20. 		if (D > 0)
  21. 		{
  22. 		    std::cout << "Quadratic equation\nDiscriminant: " << D << "\n" << "Two solutions: " << -b+std::sqrt(D)/2 << " " << -b-std::sqrt(D)/2;
  23. 		}
  24. 		if (D < 0)
  25. 		{
  26. 			std::cout << "Quadratic equation\nDiscriminant: " << D << "\n" << "No Solutions"; 
  27. 		}
  28. 	}
  29. 	else if (a == 0 && b == 0 && c == 0)
  30. 	{
  31. 		std::cout << "Non-quadratic equation\nInfinite solutions";
  32. 	}
  33. 	else 
  34. 	{
  35. 	   int D = b*b - 4*a*c;
  36. 		if (D > 0)
  37. 		{
  38. 		    std::cout << "Quadratic equation\nDiscriminant: " << D << "\nTwo solutions: " << -b+std::sqrt(D)/2 << " " << -b-std::sqrt(D)/2;
  39. 		}
  40. 		if (D < 0)
  41. 		{
  42. 			std::cout << "Quadratic equation\nDiscriminant: " << D << "\nNo Solutions"; 
  43. 		}	
  44. 	}
  45. }
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Non-quadratic equation
Infinite solutions
https://ideone.com/vSNgaX
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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