Java实现一元二次方程求根问题

package Hello;
import java.util.Scanner;
public class Yi{
  public static void main(String[] args) {
  double a,b,c;
  while(true) {
  System.out.println("Please enter a:");
  Scanner sc = new Scanner(System.in);
  a=sc.nextDouble();
  System.out.println("Please enter b:");
  Scanner sc1 = new Scanner(System.in);
  b=sc1.nextDouble();
  System.out.println("Please enter c:");
  Scanner sc2 = new Scanner(System.in);
  c=sc2.nextDouble();
    if(b*b-4*a*c<0) {
    System.out.println("The equation has no solution");
    }
    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("The root of the equation is："+X1);
    System.out.println("The root of the equation is："+X2);
    break;
    }
  }
  }
}