lab5a/ConsoleApplication1/ConsoleApplication1.cpp

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
    cout << setprecision(2);
    float a, b, c;
    cout << "Podaj a: ", cin >> a;
    cout << "Podaj b: ", cin >> b;
    cout << "Podaj c: ", cin >> c;

    cout << "Rownanie: " << a << "x^2 + " << b << "x + " << c << " = 0" << endl;

    float delta = (b * b) - (4 * a * c);
    if (delta < 0) cout << "Brak pierwiastkow" << endl;
    else if (delta == 0) {
        float x = -b / (2 * a);
        cout << "1 pierwiastek: x = " << x << endl;
    }
    else {
        float x1, x2;
        float sq = sqrt(delta);
        x1 = (-b - sq) / (2 * a);
        x2 = (-b + sq) / (2 * a);
        cout << "2 pierwiastki: x1 = " << x1 << ", x2 = " << x2 << endl;
    }
}