public static 運算類別 ProduceOperator(string operatorStr)
{
switch (operatorStr)
{
case "+": oper = new Plus(); break;
case "-": oper = new Minus(); break;
case "*": oper = new Multiply(); break;
case "/": oper = new Divide(); break;
}
return(oper);
}
static void Main(string[] args)
{
Console.WriteLine("Input NumberA:");
string numberAStr = Console.ReadLine();
Console.WriteLine("Input NumberB:");
string numberBStr = Console.ReadLine();
Console.WriteLine("Input Operator:");
string operatorStr = Console.ReadLine();
運算類別 oper = Factory.ProduceOperator(operatorStr);
oper.NumberA = Convert.ToDouble(numberAStr);
oper.NumberB = Convert.ToDouble(numberBStr);
Console.WriteLine(oper.operation());
Console.ReadKey();
}
