static void Run()
{
Opration opration = new Opration();
while (true)
{
try
{
//获取输入
Console.WriteLine("请输入数字A: ");
string strNumberA = Console.ReadLine();
Console.WriteLine("请输入运算符号(+,-,*,/): ");
string strOprate = Console.ReadLine();
Console.WriteLine("请输入数字B: ");
string strNumberB = Console.ReadLine();
//工厂根据输入生产出实例
opration = OprationFactory.CreateOperate(strOprate);
opration.NumberA = Convert.ToDouble(strNumberA);
opration.NumberB = Convert.ToDouble(strNumberB);
Console.WriteLine("结果:" + opration.GetResult());
}
catch (Exception ex)
{
Console.WriteLine("输入错误:" + ex.Message);
}
}
}
public static Opration CreateOperate(string operate)
{
Opration operation = null;
switch (operate)
{
case "+": operation = new OprationAdd(); break;
case "-": operation = new OprationSub(); break;
case "*": operation = new OprationMul(); break;
case "/": operation = new OprationDiv(); break;
default: throw new Exception("运算符号未注册!");
}
return(operation);
}