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자바 스크립트로 만든 Stack Demo

컴퓨터 이야기/JAVA(자바)2008. 10. 2. 15:25

 

자바 스크립트로 2001년 1월에 만든 Stack Demo 프로그램

 

 

<html>
<head>
<title> Html Stack </title>
</head>

<script language="javascript">
<!--
// [ ]---------------------------------------[ ]
//  |             Stack Object                |
//  |                         Written by lng  |
//  |                            2001. 1. xx  |
// [ ]---------------------------------------[ ]

   function Push(TrVal)
   {
      this.Stack[this.Head] = TrVal
      this.Head++
   }

   function Pop()
   {
     if (this.Head>0)
     {
         this.Head--
         return this.Stack[this.Head+1]
     }
     else
         return null
   }

   function GetTop()
   {
     if (this.Head>0)
     {
         return this.Stack[this.Head]
     }
     else
         return null
   }
   function GetnValue(nValue)
   {
     if (this.Head>=nValue)
     {
         return this.Stack[nValue]
     }
     else
         return null
   }

   function Getn()
   {
      return this.Head
   }

   function IsEmpty()
   {
     if (this.Head>0)
     {
         return false
     }
     else
         return true
   }

   function ProStack()
   {

      this.Head = 0
      this.Push = Push           // Push a value to the stack
      this.Pop = Pop             // Pop a value to the stack
      this.ViewTop = GetTop      // Get a value which is the value on top of the stack
      this.IsEmpty = IsEmpty     // Check the stack which is empty or not
      this.GetnValue = GetnValue // Get a value which is the value of n'st in the stack
      this.GetTop = GetTop      
      this.Getn = Getn
      this.Stack = new Array()
      return this
   }

//-->
</script>

<body>
<center>
<form name="stack">
   <p>
   <h2> STACK DEMO </h>
   <br> <br> <br>
   <input type="button" name="but0" value="push 0" onClick="PushItem('0')">
   <input type="button" name="but1" value="push 1" onClick="PushItem('1')">
   <input type="button" name="but2" value="push 2" onClick="PushItem('2')">
   <input type="button" name="but3" value="push 3" onClick="PushItem('3')">
   <input type="button" name="but4" value="push 4" onClick="PushItem('4')">
   <input type="button" name="but5" value="push 5" onClick="PushItem('5')">
   <input type="button" name="but6" value="push 6" onClick="PushItem('6')">
   <input type="button" name="but7" value="push 7" onClick="PushItem('7')">
   <input type="button" name="but8" value="push 8" onClick="PushItem('8')">
   <input type="button" name="but9" value="push 9" onClick="PushItem('9')">
   <input type="button" name="but9" value="pop" onClick="PopItem()">
   </p>
   <p>
     <table border=0>
        <tr>
           <th> bottom of the stack</th>
           <th> <-------------------------------------------------------------------> </th>
           <th> top of the stack</th>
        <tr>
     </table>
     <input type="text" name="text1" value=" " size=100> <br>
     <br><br>
     Number of item in the stack :  <input type="text" name="text2" value=" " size=2> 
   </p>

<script language="javascript">
<!--
   TStack = new ProStack
   function PushItem(AValue)
   {
       TStack.Push(AValue)
       DisplayStack()
   }

   function PopItem(AValue)
   {
       TStack.Pop()
       DisplayStack()
   }

   function DisplayStack()
   {
      var i
      i = TStack.Getn()
      document.stack.text1.value = ""
      document.stack.text2.value = i
      for(i=0;i<TStack.Getn();i++)
         document.stack.text1.value
           = document.stack.text1.value + " < " + TStack.GetnValue(i) + " > "
   }
//-->
</script>

</form>
</center>
</body>
</html>

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