rownanie kwadratowe

#include <iostream>
#include <cmath>
#include <cstdlib>
#include <cstdlib>
using namespace std;

int main()
{
    double a, b, c, delta;

    cout<<endl;
    cout<<"STABILNY ALGORYTM  OBLICZAJACY ROWNANIE KWADRATOWE" <<endl<<endl<<endl;

    cout << "Podaj a, b, c:" << endl;
    cout<<"a= ";
    cin>>a;
    cout<<"b= ";
    cin>>b;
    cout<<"c= ";
    cin>>c;
    delta=pow(b,2)-4*a*c;
    cout<<endl;

    if (a==0)
        {
            cout<<"To nie jest rownanie kwadratowe!!!" <<endl;
        }
    else if (delta<0)
        {
            cout<<"Rownanie nie ma pierwiastkow" <<endl;
        }
    else if (delta==0)
        {
            double x= -b/(2*a);
            cout<<"Rozwiazanie to: "<<x;
            cout<<endl;
        }
    else
        {
                double pom=c/a;

                if(b>0)
                    {
                        double x1=(-b-sqrt(delta))/(2*a);
                        double x2=pom/x1;

                        cout<<"Rozwiazania to: "<<x1<<" oraz "<<x2<<endl;
                        cout<<endl;
                    }
                else
                    {
                        double x2=(-b+sqrt(delta))/(2*a);
                        double x1=pom/x2;
                        cout<<"Rozwiazania to: "<<x1<<" oraz "<<x2<<endl;
                        cout<<endl;
                    }
        }
    system("pause");
    return 0;


}