static void Main()
{
BaseOperator addop = GenOpFactory.GenOp("+");
addop.NumberA = 1;
addop.NumberB = 2;
Console.WriteLine(addop.OperateInt());
BaseOperator subOp = GenOpFactory.GenOp("-");
subOp.NumberA = 2;
subOp.NumberB = 1;
Console.WriteLine(subOp.OperateInt());
}
public static BaseOperator GenOp(string tag)
{
BaseOperator op = null;
switch (tag)
{
case "+":
op = new AddOp();
break;
case "-":
op = new SubOp();
break;
}
return(op);
}