#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main() {

    double a,b,c,x1,x2,discriminant;
	cout.setf(ios::fixed | ios::showpoint);
    cout.width(10);
    cout.precision(10);

	cout << "Quadratic Equation: ax2 + bx + c = 0:" << endl;
	cout << "Enter a value for the coefficient 'a': ";
    cin >> a;
	cout << "Enter a value for the coefficient 'b': ";
    cin >> b;
	cout << "Enter a value for the coefficient 'c': ";
    cin >> c;

	if(a==0)
		cout << "x = " << -c/b << endl;
	else {
		discriminant=(b*b)-(4*a*c);
		if(discriminant==0)
			cout << "x1 = x2 = " << -b/(2*a) << endl;
		else {
			//discriminant is positive
			if(discriminant > 0) {
				cout << "x1 = " << (-b+sqrt(discriminant))/(2*a) << endl;
				cout << "x2 = " << (-b-sqrt(discriminant))/(2*a) << endl;
			}
			//discriminant is negative
			else {
				cout << "x1 = " << -b/(2*a) << " + i" << sqrt(fabs(discriminant))/(2*a) << endl;
				cout << "x2 = " << -b/(2*a) << " - i" << sqrt(fabs(discriminant))/(2*a) << endl;
			}
		}
	}
    system("pause");
    return 0;
}