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<pre align="left">
<b><font face="Arial" size="4">【<font color="#0066CC">example</font>】 <font color="#CC0033">Add to a queue</font>
void <font color="#FF0033">addq</font>(int *rear, element item)
{ <font color="#FF0099"><i><font size="3"> /* add an item to the queue */</font></i></font>
if ( *rear == MAX_QUEUE_SIZE -1 ) {
queue_full( );
return;
}
queue[++*rear] = item;
}
【<font color="#0033CC">example</font>】<font color="#FF0033"> Delete from a queue</font>
element<font color="#FF0033"> deleteq</font>(int *front, int rear)
{ <font color="#CC0099"><i><font size="3"> /* remove element at the front of the queue */</font></i></font>
if ( *front == rear )
return queue_empty( ); <i><font size="3" color="#FF0099">/* return an error key */</font></i>
return queue[++*front];
}
【<font color="#0033CC">example</font>】<font color="#FF0033">Job scheduling</font> <i> O ( <font size="3">MAX_QUEUE_SIZE</font>)</i></font></b></pre>
<table width="556" border="1" hspace="10" cellspacing="0">
<tr>
<td width="49">
<div align="center"><font size="3" face="Arial" color="#000000"><b>front</b></font></div>
</td>
<td width="44">
<div align="center"><font size="3" face="Arial" color="#000000"><b>rear</b></font></div>
</td>
<td width="55" bordercolor="#FFFFFF"><font size="3" face="Arial" color="#FF0033"><b>Q
[0]</b></font></td>
<td width="58" bordercolor="#FFFFFF"><font size="3" face="Arial" color="#FF0033"><b>Q
[1] </b></font></td>
<td width="57" bordercolor="#FFFFFF"><font size="3" face="Arial" color="#FF0033"><b>Q
[2]</b></font></td>
<td width="56" bordercolor="#FFFFFF">
<div align="center"><font size="3" face="Arial" color="#FF0033"><b> Q [3]
</b></font></div>
</td>
<td width="244">
<div align="center"><font size="3" face="Arial" color="#FF0033"><b>commets</b></font></div>
</td>
</tr>
<tr>
<td width="49"><font size="3" face="Arial" color="#FF0033"><i><b> -1</b></i></font></td>
<td width="44"><font size="3" face="Arial" color="#FF0033"><i><b> -1 </b></i></font></td>
<td width="55"> </td>
<td width="58"> </td>
<td width="57"> </td>
<td width="56"><font size="3" face="Arial"><i><b> </b></i></font></td>
<td width="244"><font size="3" face="Arial" color="#003399"><i><b> queue is
empty</b></i></font></td>
</tr>
<tr>
<td width="49" height="29"><font size="3" face="Arial" color="#FF0033"><i><b>-1</b></i></font></td>
<td width="44" height="29"><font size="3" face="Arial" color="#FF0033"><i><b>0</b></i></font></td>
<td width="55" height="29"><font size="3" face="Arial"><i><b>j1</b></i></font></td>
<td width="58" height="29"> </td>
<td width="57" height="29"> </td>
<td width="56" height="29"><font size="3" face="Arial"><i></i></font></td>
<td width="244" height="29"><font size="3" face="Arial" color="#003399"><i><b>job1
is added</b></i></font></td>
</tr>
<tr>
<td width="49"><font size="3" face="Arial" color="#FF0033"><i><b>-1</b></i></font></td>
<td width="44"><font size="3" face="Arial" color="#FF0033"><i><b>1</b></i></font></td>
<td width="55"><font size="3" face="Arial"><i><b>j1</b></i></font></td>
<td width="58"><font size="3" face="Arial"><i><b>j2</b></i></font></td>
<td width="57"> </td>
<td width="56"><font size="3" face="Arial"><i><b> </b></i></font></td>
<td width="244"><font size="3" face="Arial" color="#003399"><i><b>job2 is
added</b></i></font></td>
</tr>
<tr>
<td width="49"><font size="3" face="Arial" color="#FF0033"><i><b> -1</b></i></font></td>
<td width="44"><font size="3" face="Arial" color="#FF0033"><i><b> 2</b></i></font></td>
<td width="55"><font size="3" face="Arial"><i><b>j1</b></i></font></td>
<td width="58"><font size="3" face="Arial"><i><b>j2 </b></i></font></td>
<td width="57"><font size="3" face="Arial"><i><b>j3</b></i></font></td>
<td width="56"><font size="3" face="Arial"><i><b> </b></i></font></td>
<td width="244"><font size="3" face="Arial" color="#003399"><i><b>job3 is
added</b></i></font></td>
</tr>
<tr>
<td width="49"><font size="3" face="Arial" color="#FF0033"><i><b> 0</b></i></font></td>
<td width="44"><font size="3" face="Arial" color="#FF0033"><i><b>2</b></i></font></td>
<td width="55"> </td>
<td width="58"><font size="3" face="Arial"><i><b>j2 </b></i></font></td>
<td width="57"><font size="3" face="Arial"><i><b>j3</b></i></font></td>
<td width="56"><font size="3" face="Arial"><i><b> </b></i></font></td>
<td width="244"><font size="3" face="Arial" color="#003399"><i><b>job1 is
deleted</b></i></font></td>
</tr>
<tr>
<td width="49"><font size="3" face="Arial" color="#FF0033"><i><b>1</b></i></font></td>
<td width="44"><font size="3" face="Arial" color="#FF0033"><i><b>2</b></i></font></td>
<td width="55"> </td>
<td width="58"> </td>
<td width="57"><font size="3" face="Arial"><i><b>j3 </b></i></font></td>
<td width="56"><font size="3" face="Arial"><i><b> </b></i></font></td>
<td width="244"><font size="3" face="Arial" color="#003399"><i><b>job2 is
deleted</b></i></font></td>
</tr>
</table>
<pre align="left">
</pre>
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