static void Main(string[] args)
{
try
{
Console.WriteLine("欢迎来到.net高级班公开课之设计模式特训，今天是Eleven老师为大家带来的策略模式");
Console.WriteLine("下面是一个计算器展示demo：");
while (true)
{
Console.WriteLine("******************************");
Console.WriteLine("******************************");
Console.WriteLine("******************************");
#region 用户输入和校验 前端逻辑
int iInputLeft = 0;
int iInputRight = 0;
string operate = "";
Console.WriteLine("输入第一个数字(整数):");
string sInputLeft = Console.ReadLine();
if (!int.TryParse(sInputLeft, out iInputLeft))
{
Console.WriteLine("输入数字无效,请重新输入");
continue;
}
Console.WriteLine("输入计算符号(+-*/):");
operate = Console.ReadLine();
if (!new string[] { "+", "-", "*", "/" }.Contains(operate))
{
Console.WriteLine("输入计算符号无效,请重新输入");
continue;
}
Console.WriteLine("输入第二个数字(整数):");
string sInputRight = Console.ReadLine();
if (!int.TryParse(sInputRight, out iInputRight))
{
Console.WriteLine("输入数字无效,请重新输入");
continue;
}
#endregion
#region 具体计算 业务逻辑
int iResult = 0;
//switch (operate)
//{
// case "+":
// iResult = iInputLeft + iInputRight;
// break;
// case "-":
// iResult = iInputLeft - iInputRight;
// break;
// case "*":
// iResult = iInputLeft * iInputRight;
// break;
// case "/":
// iResult = iInputLeft / iInputRight;//非0检测 每一个分支的逻辑可能很复杂
// break;
// default:
// Console.WriteLine("输入符号异常,重新输入");
// continue;
//}
//BaseCaculation baseCaculation = null;
//switch (operate)//就是把计算的逻辑封装到类里面，同时提供了抽象，好处就在于逻辑清晰，维护方便
//{
// case "+":
// baseCaculation = new Plus();
// break;
// case "-":
// baseCaculation = new Minus();
// break;
// case "*":
// baseCaculation = new Multiply();
// break;
// case "/":
// baseCaculation = new Division();
// break;
// default:
// Console.WriteLine("输入符号异常,重新输入");
// continue;
//}
BaseCaculation baseCaculation = SimpleFactory.CreateCaculation(operate);
//iResult = baseCaculation.Cuculation(iInputLeft, iInputRight);
Context context = new Context(iInputLeft, iInputRight, baseCaculation);
iResult = context.Caculation();
Console.WriteLine("计算为: {0}{1}{2}={3}", iInputLeft, operate, iInputRight, iResult);
#endregion
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.Read();
}
static void Main(string[] args)
{
Console.WriteLine("欢迎来到软谋教育.net高级班公开课之设计模式特训课，今天是Eleven老师为大家带来的策略模式");
bool isGoon = true;
while (isGoon)
{
Console.WriteLine("请输入第一个数字:");
string sInput1 = Console.ReadLine();
Console.WriteLine("请输入+-*/:");
string sOperate = Console.ReadLine();
Console.WriteLine("请输入第二个数字:");
string sInput2 = Console.ReadLine();
int iInput1 = 0;
int iInput2 = 0;
if (!int.TryParse(sInput1, out iInput1) || !int.TryParse(sInput2, out iInput2))
{
Console.WriteLine("请输入有效数字");
continue;
}
//检测0
int result = 0;
//switch (sOperate)//业务逻辑和算法混合在一起去了
//{
// case "+":
// result = iInput1 + iInput2;
// break;
// case "-":
// result = iInput1 - iInput2;
// break;
// case "*":
// result = iInput1 * iInput2;
// break;
// case "/":
//检测0
// result = iInput1 / iInput2;
// break;
// default:
// {
// Console.WriteLine("操作符号异常");
// continue;
// }
//}
//switch (sOperate)//业务逻辑和算法分开
//{
// case "+":
// {
// BaseStrategy strategy = new PlusStrategy();
// strategy.LeftInput = iInput1;
// strategy.RightInput = iInput2;
// result = strategy.Calculation();
// }
// break;
// case "-":
// {
// BaseStrategy strategy = new MinusStrategy();
// strategy.LeftInput = iInput1;
// strategy.RightInput = iInput2;
// result = strategy.Calculation();
// }
// break;
// case "*":
// {
// BaseStrategy strategy = new MutiplyStrategy();
// strategy.LeftInput = iInput1;
// strategy.RightInput = iInput2;
// result = strategy.Calculation();
// }
// break;
// case "/":
// {
// BaseStrategy strategy = new DivisionStrategy();
// strategy.LeftInput = iInput1;
// strategy.RightInput = iInput2;
// result = strategy.Calculation();
// }
// break;
// default:
// {
// Console.WriteLine("操作符号异常");
// continue;
// }
//}
//switch (sOperate)//引入context 1 可以添加额外处理 2为计算准备一些客户端不需要知道的数据
//{
// case "+":
// {
// BaseStrategy strategy = new PlusStrategy();
// Context context = new Context(strategy);
// result = context.Calculation(iInput1,iInput2);
// }
// break;
// case "-":
// {
// BaseStrategy strategy = new MinusStrategy();
// Context context = new Context(strategy);
// result = context.Calculation(iInput1, iInput2);
// }
// break;
// case "*":
// {
// BaseStrategy strategy = new MutiplyStrategy();
// Context context = new Context(strategy);
// result = context.Calculation(iInput1, iInput2);
// }
// break;
// case "/":
// {
// BaseStrategy strategy = new DivisionStrategy();
// Context context = new Context(strategy);
// result = context.Calculation(iInput1, iInput2);
// }
// break;
// default:
// {
// Console.WriteLine("操作符号异常");
// continue;
// }
//}//上端必须知道所有的算法，并负责选择算法
//不需要知道算法 也不负责选择 职责交给简单工厂
BaseStrategy strategy = SimpleFactory.CreateInstance(sOperate);
Context context = new Context(strategy);
result = context.Calculation(iInput1, iInput2);
Console.WriteLine("{0}{1}{2}={3}", iInput1, sOperate, iInput2, result);
}
Console.Read();
}