package exercise3;import java.util.Scanner;public class Main1 {    public static void main(String[] args) {        Scanner input = new Scanner(System.in);        double a = input.nextDouble();        double b = input.nextDouble();        double c = input.nextDouble();        double panbieshi = b*b-4*a*c;        if(panbieshi < 0)        {            System.out.println("没有值");        }        else if(panbieshi == 0)        {            double r1 = -b/(2*a);            System.out.println(r1);        }else{             double r1 = (-b + Math.pow(panbieshi, 0.5)) / (2 * a);               double r2 = (-b - Math.pow(panbieshi, 0.5)) / (2 * a);               System.out.println("The roots are " + r1 + " and " + r2);        }    }    }