public static Operation CreateOperation(string strOperator)
{
Operation opr = null;
switch (strOperator)
{
case "+":
opr = new OperationAdd();
break;
case "-":
opr = new OperationSub();
break;
case "*":
opr = new OperationMul();
break;
case "/":
opr = new OperationDiv();
break;
default:
throw new Exception("运算符输入错误！");
}
return(opr);
}
/// <summary>
/// 只需输入运算符，工厂就能实例化出合适的对象，通过多态，返回父类的方式实现了计算器的结果
/// </summary>
/// <param name="operate">运算符</param>
/// <returns></returns>
public static Operation createOpeate(EnumOperator op)
{
Operation oper = null;
switch (op)
{
case EnumOperator.Add:
oper = new OperationAdd();
break;
case EnumOperator.Minus:
oper = new OperationSub();
break;
case EnumOperator.Multiply:
oper = new OperationMul();
break;
case EnumOperator.Divide:
oper = new OperationDiv();
break;
default:
break;
}
return(oper);
}
public static Operation createOperation(string item)
{
Operation temp = null;
switch(item)
{
case "+":
temp = new OperationAdd();
break;
case "-":
temp = new OperationSub();
break;
case "*":
temp = new OperationMul();
break;
case "/":
temp = new OperationDiv();
break;
}
return temp;
}
public static Operation createOperate(string operate)
{
Operation oper = null;
switch (operate)
{
case "+":
oper = new OperationAdd();
break;
case "-":
oper = new OperationSub();
break;
case "*":
oper = new OperationMul();
break;
case "/":
oper = new OperationDiv();
break;
}
return(oper);
}
public static Operation createOperation(string item)
{
Operation temp = null;
switch (item)
{
case "+":
temp = new OperationAdd();
break;
case "-":
temp = new OperationSub();
break;
case "*":
temp = new OperationMul();
break;
case "/":
temp = new OperationDiv();
break;
}
return(temp);
}
