#include<iostream>
#include<math.h>
float delta(float,float,float);
float x0(float,float);
float x1(float,float,float);
float x2(float,float,float);
float main()
{
	using namespace std;
	float a,b,c;
	cout<<"Podaj a,b,c: "<<endl;
	cin>>a;
	while(a==0)
	{
		cout<<"Rownanie nie jest kwadratowe. Podaj a rozne od zera."<<endl;
		cin>>a;
	}
	cin>>b;
	cin>>c;
	delta(a,b,c);
	if(delta(a,b,c)>0)
	{
		cout<<"Delta: "<<delta(a,b,c)<<endl;
		cout<<"X="<<x1(a,b,delta(a,b,c))<<"\t"<<" lub "<<"\t"<<"X="<<x2(a,b,delta(a,b,c))<<endl;
	}
	else
	{
		if(delta(a,b,c)==0)
		{
			cout<<"Delta: "<<delta(a,b,c)<<endl;
			cout<<"X="<<x0(a,b)<<endl;
		}
		else
		{
			cout<<"Delta: "<<delta(a,b,c)<<endl;
			cout<<"Rownanie nie ma rozwiązania"<<endl;
		}
	}
	return 0;
}
float delta(float a,float b,float c)
{
	return (b*b-4*a*c);
}
float x0(float a,float b)
{
	return (-b/2*a);
}
float x1(float a,float b,float delta)
{
	return ((-b-sqrt(delta))/(2*a));
}
float x2(float a,float b,float delta)
{
	return ((-b+sqrt(delta))/(2*a));
}