using System;

public class Program

{

    public static void Main()

    {

        char x1, y1, x2, y2;

        string k1, k2;

        Console.WriteLine("Unsite Kordinate prve tačke:");

        k1 = Console.ReadLine();

        int i=0;

        x1 = k1[i];

        int X1 = x1 - '0';

        y1 = k1[i+2];

        int Y1 = y1 - '0';

        Console.WriteLine("Unsite Kordinate druge tačke:");

        k2 = Console.ReadLine();

        i=0;

        x2 = k2[i];

        int X2 = x2 - '0';

        y2 = k2[i+2];

        int Y2 = y2 - '0';

        double r;

        r = Math.Sqrt(Math.Pow((X1-X2),2) + Math.Pow((Y1-Y2),2));

        Console.WriteLine("Rastojanje je "+r);

    }

}

​