static void Main()
{
Computing computing = new Computing();
Console.WriteLine("Addition:{0}", computing.Add(89, 67));
Console.WriteLine(" Class Name:{0}", computing.GetName());
IScientificCalculator s = new Computing();
Console.WriteLine(s.CalcName()); // IScientificCalculator
INormalCalculator r = new Computing();
Console.WriteLine(r.CalcName()); // INormalCalculator
Console.Read();
}
static void Main()
{
Computing computing = new Computing();
Console.WriteLine("adition is {0}", computing.Add(9, 7));
Console.WriteLine("class name {0}", computing.GetName());
IscientificCalculator s = new Computing();
Console.WriteLine(s.CalcName());
INormalCalculator r = new Computing();
Console.WriteLine(r.CalcName());
Console.Read();
}