public static Operation creatOperate(string operate)
{
Operation oper = null;
switch (operate)
{
case "+":
{
oper = new OpertionAdd();
break;
}
case "-":
{
oper = new OpertionSub();
break;
}
case "*":
{
oper = new OpertionMul();
break;
}
case "/":
{
oper = new OpertionDiv();
break;
}
}
return oper;
}
public static Operation creatOperate(string operate)
{
Operation oper = null;
switch (operate)
{
case "+":
{
oper = new OpertionAdd();
break;
}
case "-":
{
oper = new OpertionSub();
break;
}
case "*":
{
oper = new OpertionMul();
break;
}
case "/":
{
oper = new OpertionDiv();
break;
}
}
return(oper);
}
