📄 c22_21.htm
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>练习题</title>
<meta name="GENERATOR" content="Microsoft FrontPage 3.0">
<script language="javascript">
function init(){
cor=cordiv.style;
err=errdiv.style;
hint=hintdiv.style;
errortimes=0;
}
function show(obj){
obj.display='';
}
function hide(obj){
obj.display='none';
}
function judge(){
var s=document.form.T1.value;
if(s=="97531"){
errortimes=0;
hide(hint);
hide(err);
show(cor);
}else{
errortimes++;
if(errortimes==3) show(hint);
hide(cor);
show(err);
}
}
</script>
</head>
<body bgcolor="#ccefcc" onLoad="init()">
<blockquote>
<div align="center"><center><table border="6" width="279" cellspacing="0" cellpadding="6"
height="201" bordercolor="#FF9933">
<tr>
<th width="503" bgcolor="#FF9933" height="11">程序</th>
</tr>
<tr>
<td ALIGN="center" width="503" bgcolor="#00FFFF" height="162"><p align="left">main()<br>
{<br>
int number,digit;<br>
number=13579;<br>
do<br>
{<br>
digit=number % 10;<br>
printf("%d",digit);<br>
number=number / 10;<br>
} while (number != 0);<br>
}</td>
</tr>
</table>
</center></div><p>你知道这个程序做什么吗? </p>
<form name="form">
<p>请键入结果:<input type="text" name="T1" size="16"><input type="button"
value="Enter" name="B1" onClick="judge()"></p>
</form>
<div id="cordiv" style="display:'none'"><font color="#0000FF"><p>正确! 做的很好!</font></p>
</div><div id="errdiv" style="display:'none'"><p><font color="#FF0000">错误!
再做一次!</font></p>
</div><div id="hintdiv" style="display:'none'"><p>程序改变了数字 13579 的数组。<br>
噢! 它真的很难。答案是 97531, 请输入它。</p>
<p><font color="#FF0000">你要加把劲!</font></p>
</div>
</blockquote>
<p align="center"><a href="javascript:close()">关闭</a></p>
</body>
</html>
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