Практика7.9

package com.company;

import java.util.Scanner;

public class Main {

    interface Counter {
        double Discriminant(double a, double b, double c);
    }

    public static void main(String[] args) {
        double a, b, c;
        Scanner vvod = new Scanner(System.in);
        System.out.println("Введите значения для a, b, c: ");
        a=vvod.nextDouble();
        b=vvod.nextDouble();
        c=vvod.nextDouble();

        Counter Ref = (double A, double B, double C) -> {
            double D = B * B - 4 * A * C;
            return D;
        };

        System.out.println("Дискриминант: " +Ref.Discriminant(a, b, c));
    }
}