public static CalculatorFacade Instance()
{
if (_instance == null)
{
_instance = new CalculatorFacade();
}
return(_instance);
}
static void Main(string[] args)
{
var a = 4.5f;
var b = 3;
Console.WriteLine(string.Format("{0}+{1}={2}", a, b, CalculatorFacade.Instance().Add(a, b)));
Console.WriteLine(string.Format("{0}/{1}={2}", a, b, CalculatorFacade.Instance().Divide(a, b)));
Console.WriteLine(string.Format("{0}-{1}={2}", a, b, CalculatorFacade.Instance().Substract(a, b)));
Console.WriteLine(string.Format("{0}*{1}={2}", a, b, CalculatorFacade.Instance().Multiply(a, b)));
Console.WriteLine(string.Format("{0}^{1}={2}", a, b, CalculatorFacade.Instance().Power(a, b)));
}
