#include "stdafx.h"
#include <iostream>
#include<cmath>

int main()
{
    float a, b, c, x1, x2, D, eps = 0.001;
    std::cout << "VVedit koeficientu" << "\n";
    std::cin >> a >> b >> c;

    if (a == 0 && b == 0 && c == 0) {
        std::cout << "rivnanja pogano obymovlene" << "\n";
        system("pause");
        exit;
    }
    else if (a == 0 && b != 0 && c != 0) {
        float x;
        //bx+c=0
        //x=-c/b
        x = -c / b;
        std::cout << "x= " << x << "\n";
        system("pause");
        exit;
    }
    else if (a == 0 && b == 0 && c != 0) {
        std::cout << "Rivnanja ne mae rozvjazkiv" << "\n";
        system("pause");
        exit;
    }
    else {
        D = b*b - 4 * a*c;
        if (D < 0) {
            std::cout << "rivnaja ne maje rozvjazkiv" << "\n";
            system("pause");
        }
        else if (abs(D) < eps) {
            float x;
            x = (-b / (2 * a));
            std::cout << "x = " << x << "\n";
        }
        else
        {
            x1 = (-b + sqrt(D)) / (2 * a);
            x2 = (-b - sqrt(D)) / (2 * a);
            std::cout << "x1=" << x1 << "\n" << "x2=" << x2 << "\n";
            system("pause");
        }
    }
}