import java.util.Scanner;
public class Example1
{
public static void main(String args[])
{
double a,b,c;
System.out.println("请输入a:");
Scanner sc=new Scanner(System.in);
a=sc.nextDouble();
System.out.println("请输入b:");
Scanner sb=new Scanner(System.in);
b=sb.nextDouble();
System.out.println("请输入c:");
Scanner sa=new Scanner(System.in);
c=sa.nextDouble();
if(b*b-4*a*c<0)
{
System.out.println("该方程无解");
}
else
{
double x1=(-b+Math.sqrt(b*b-4*a*c)*1/(2*a));
double x2=(-b-Math.sqrt(b*b-4*a*c)*1/(2*a));
System.out.println("方程的跟为"+x1);
System.out.println("方程的跟为"+x2);
}
}
}