多步骤算法的设计模式

问题描述：

我正在编写一个控制台应用程序，该应用程序通过N个步骤来完成算法。重要的是在执行步骤 N + 1 之前正确完成步骤 N 。否则，程序应停止处理并显示错误消息。

I'm writing a console application that goes through an algorithm with N number of steps. It is important that step N is correctly done before step N+1 is executed. Otherwise the program should stop working with an error message.

我当然可以使用嵌套的如果语句来做到这一点，并使用 try-catch-最终（使用finally标志来决定程序是否应该处理）。但是我正在寻找一种更好的结构化设计模式或方法来做到这一点。有什么建议吗？

I can do this with nested if statements of course and use try-catch-finally (using a continue flag in finally to decided if the program should process). But I am looking for a better structured design pattern or approach to do this. Any recommendations?

答

我曾经创建了一个控制自动化的过程，并且使用了所有步骤的枚举

I have once created an process that was controlling an automation and I used an enumeration with all the steps

enum AutomationStep{Requested, Started, Waiting, Processing, Terminating};

后来，我创建了一个开关/案例来以不同的方式处理每个步骤

Later I created a switch/case to process every step differently

switch (currentStep)
{
  case AutomationStep.Requested : InitializeProcess(); currentstep = AutomationStep.Started; break;
  case AutomationStep.Started : StartTheEngines(); currentstep = AutomationStep.Waiting; break;
  case AutomationStep.Waiting : //etc
   break;
   default:
}

您以后可以使用While运行每一步

You may later use a While to run every step

多步骤算法的设计模式

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