static void Main(string[] args)
{
Console.WriteLine("Hello World!!");
BetterCalculator cal = new BetterCalculator();
var add = cal.Add(10, 20);
Console.WriteLine(add);
var sub = cal.sub(10, 20);
Console.WriteLine(sub);
var mul = cal.Add(10, 20);
Console.WriteLine(mul);
var div = cal.sub(10, 20);
Console.WriteLine(div);
BestStudent bcal = new BestStudent();
int localSum = bcal.LocalSum();
bcal.BlaBla();
Console.ReadKey();
}
