demo_js_euler.htm

来自「Delphi脚本控件」· HTM 代码 · 共 74 行

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74 行
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<html>
<head>
<link rel=stylesheet type="text/css" href="styles.css">
</head>

<body>

<h3>
LISPPA: Euler algorithm (paxJavaScript).
</h3>
<hr>

<blockquote>
<pre>
<font color="blue"><b>function</b></font> Cycle(InitV, A){
  <font color="blue"><b>var</b></font> P, Stack, result, U, V;
  result = <font color="blue"><b>NULL</b></font>;
  Stack = [InitV, <font color="blue"><b>NULL</b></font>];
  <font color="blue"><b>while</b></font> (Stack != <font color="blue"><b>NULL</b></font>) {
    V = Stack[0];
    P = & A[V];
    <font color="blue"><b>if</b></font> (P != <font color="blue"><b>NULL</b></font>) {
      U = P[0];
      <font color="blue"><b>reduced</b></font> P = P[1];
      Stack = [U, Stack];
      P = & A[U];
      <font color="blue"><b>while</b></font> (P != <font color="blue"><b>NULL</b></font>) {
        <font color="blue"><b>if</b></font> (P[0] == V) {
          <font color="blue"><b>reduced</b></font> P = P[1];
          <font color="blue"><b>break</b></font>;
        }
        P = & P[1];
      }
    }
    <font color="blue"><b>else</b></font> {
      <font color="blue"><b>reduced</b></font> Stack = Stack[1];
      result = [V, result];
    }
  }
  <font color="blue"><b>return</b></font> result;
}

<font color="blue"><b>var</b></font> A[10], Path, P;

A[1] = [2, [3, <font color="blue"><b>NULL</b></font>]];
A[2] = [1, [3, [7, [8, <font color="blue"><b>NULL</b></font>]]]];
A[3] = [1, [2, [4, [5, <font color="blue"><b>NULL</b></font>]]]];
A[4] = [3, [5, <font color="blue"><b>NULL</b></font>]];
A[5] = [3, [4, [6, [8, <font color="blue"><b>NULL</b></font>]]]];
A[6] = [5, [7, [8, [9, <font color="blue"><b>NULL</b></font>]]]];
A[7] = [2, [6, [8, [9, <font color="blue"><b>NULL</b></font>]]]];
A[8] = [2, [5, [6, [7, <font color="blue"><b>NULL</b></font>]]]];
A[9] = [6, [7, <font color="blue"><b>NULL</b></font>]];

Path = Cycle(1, A);

<font color="blue"><b>println</b></font> <font color="Red">'Euler path: '</font>;
P = & Path;
<font color="blue"><b>while</b></font> (P != <font color="blue"><b>NULL</b></font>) {
  <font color="blue"><b>println</b></font> P[0];
  P = & P[1];
}
</pre>
</blockquote>

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