using System;

using Geometrie;

namespace Geometrie

{

    public class Punct

    {  public string nume;

        public double x,y;

        public Punct(string denumire, double  a , double b)

        {   nume=denumire;

            x=a;

            y=b;

        }

        public void Afisare()

        { Console.Write(nume+"(");

    if(x!=0)     Console.Write("{0:#.##}",x); else Console.Write("0.00");

          Console.Write(",");

        if(y!=0) Console.Write("{0:#.##}",y); else Console.Write("0.00");

         Console.Write(") ");

        }

    }

}

public class Segment

{   string nume;

 double lungime;

    Punct a,b;

    public Segment(string denumire, double ax,double ay,double bx,double by)

    { nume=denumire;

        a=new Punct(nume.Substring(0,1),ax,ay);

        b=new  Punct(nume.Substring(1,1),bx,by);

    }

    public void LSegment()

    {   

        lungime= System.Math.Sqrt((b.x-a.x)*(b.x-a.x)+(b.y-a.y)*(b.y-a.y));

    }

 public void Afis()

 { Console.Write("Distanta dintre ");

  a.Afisare();

  Console.Write("si ");

  b.Afisare();

 if(lungime!=0) Console.Write("este {0:#.##} ",lungime); else Console.Write(" este 0.00");

 }

}

public class Program

{

    public static void Main()

    {

        Segment s=new Segment("AB",5,10,2,1);

        s.LSegment();

        s.Afis();

    }

}