#include <iostream>

using namespace std;

class Polynomial
{
    float a;
    float b;
    float c;

public:

    void setCoefficients(float newA,float newB, float newC)
    {
        a=newA;
        b=newB;
        c=newC;
    }

    bool isReal()
    {
        float delta=b*b-(4*a*c);
        if(delta>=0)
            return true;
        else
            return false;
    }
    bool aZero()
    {
        if(a!=0)
            return true;
        else
            return false;
    }

    float x1()
    {
        float delta=b*b-(4*a*c);
        return (-b-delta)/2*a;
    }

    float x2()
    {
        float delta=b*b-(4*a*c);
        return (-b+delta)/2*a;
    }

};

int main()
{
    Polynomial polynomial;
    polynomial.setCoefficients(1,2,1);
    cout<<"isReal : "<<polynomial.isReal()<<endl;
    cout<<"aZero : "<<polynomial.aZero()<<endl;
    if(polynomial.isReal()&&polynomial.aZero())
    {
        cout<<"x1 : "<<polynomial.x1()<<endl;
        cout<<"x2 : "<<polynomial.x2()<<endl;
    }
    return 0;
}