package qiugengongshi;

public class Root {
  
    private double a,b,c,derta;

    public double getFirstA(){
           return a;}
    public void setFirstA(double a){
               this.a=a;
    }
   
    public double getSecondB(){
           return b;}
    public void setSecondB(double b){
               this.b=b;}
  
   
    public double getThirdC(){
           return c;}
    public void setThirdC(double c){
            this.c=c;}
            
               
        //怎么在这写一个判断derta的值，并且返回给Main类
        public double calculateRoot1(double a,double b, double c){
            
            return (-b+Math.sqrt(b*b-4*a*c))/(2*a);}
            
            public double calculateRoot2(double a,double b ,double c){
            return (-b-Math.sqrt(b*b-4*a*c))/(2*a);
        }
        
    }