Question

我正在尝试构建一个自动机，我已经运行了几次，并且代码中似乎没有问题，但是仍然没有得到想要的结果，即“ CurrentState”应为X3

我提供的输入如下

string[] input = new string[4] { "a", "a", "b", "z" };

我将简化转换。但是，下表如下所示我给A，A，B应该导致X3 X1 A X1 ---------- X1 A X1 ------------ X1 B X3 ------（卡在X1上）我已经干了运行代码同样，它应该属于x3 过渡表如下

states2    token actions    output
x1               a            x1
x1               b            x3
x2               a            x2
x2               b            x1
x3               a            x3
x3               b            x4
x4               a            x2
x4               b            x3

这是代码

 for (k = 0; k < input.Length; k++) //It is 4
        {
            if (input[k] == "z")
            {
                Console.WriteLine(currentState);
                break;
                //  Environment.Exit(0);
            }
            else
            {
                for (j = 0; j < tokenActions.Length; j++) //its 8 and same as states and output
                {

                    if (currentState == states2[j] && input[k] == tokenActions[j])
                    {
                        currentState = output[j];
                    }

                }
            }
        }

更新：我注意到状态仅更改了第一个令牌的ONCE，之后保持不变。（我的观察，可能是错误的）

Answer 1

您说文件阅读器出现错误，但是代码中仍然存在错误。

在这里，我已经对您的代码进行了检测，以便其操作更加清晰。在运行该程序之前，预测其输出应为。然后运行程序。输出正确吗？

public static void Main()
{
    string currentState = "x1";
    string[] input = {"a", "a", "b", "z"};
    string[] states2 = {"x1", "x1", "x2", "x2", "x3", "x3", "x4", "x4"};
    string[] tokenActions = {"a", "b", "a", "b", "a", "b", "a", "b" };
    string[] output = {"x1", "x3", "x2", "x1", "x3", "x4", "x2", "x3"};

    for (int k = 0; k < input.Length; k++) //It is 4
    {
        if (input[k] == "z")
        {
            Console.WriteLine("final state is {0}", currentState);
            break;
            //  Environment.Exit(0);
        }
        else
        {
            Console.WriteLine("new input {0}", input[k]);
            for (int j = 0; j < tokenActions.Length; j++) //its 8 and same as states and output
            {
                if (currentState == states2[j] && input[k] == tokenActions[j])
                {
                    Console.WriteLine("input is {0} current state is {1} new state is {2}", input[k], currentState, output[j]);
                    currentState = output[j];
                }
            }
        }
    }
}

现在您看到错误了吗？

问问自己：当我最初编写代码时，如何防止这个错误？您对如何更清楚地编写代码，从而无法编写此错误有什么想法？

C＃中自动机简单条件语句的问题

1 个答案: