📄 c32_31.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(){
err1=err1div.style;
cor1=cor1div.style;
hint1=hint1div.style;
error1times=0;
}
function show(obj){
obj.display='';
}
function hide(obj){
obj.display='none';
}
function judge1(){
var s1=document.form1.C1.checked;
var s2=document.form1.C2.checked;
var s3=document.form1.C3.checked;
var s4=document.form1.C4.checked;
var s5=document.form1.C5.checked;
var s6=document.form1.C6.checked;
var s7=document.form1.C7.checked;
var s8=document.form1.C8.checked;
var s=(!s1)&&(!s2)&&(!s3)&&(!s4)&&s5&&s6&&(!s7)&&(!s8);
if(s){
error1times=0;
hide(hint1);
hide(err1);
show(cor1);
}else{
error1times++;
if(error1times==3) show(hint1);
hide(cor1);
show(err1);
}
}
</script>
</head>
<body bgcolor="#ccefcc" onLoad="init()">
<blockquote>
<p>请仔细阅读下面的程序: </p>
<div align="center"><center><table border="6" width="376" cellspacing="0" cellpadding="6"
height="165" bordercolor="#FF9933">
<tr>
<th width="600" bgcolor="#FF9933" height="11">程序</th>
</tr>
<tr>
<td ALIGN="center" width="600" bgcolor="#00FFFF" height="126"><p align="left">1. main()<br>
2. {<br>
3. int a[10];<br>
4. int i,sum=0;<br>
5. for(i=1;i<=10;i++) scanf("%d",&a[i]);<br>
6. for(i=1;i<=10;i++) sum+=a[i];<br>
7. printf("the sum is: %d\n",sum);<br>
8. }</td>
</tr>
</table>
</center></div><p>在这个程序中, 哪行有错? 请选择行号:</p>
<form name="form1">
<p>1.<input type="checkbox" name="C1" value="ON"> 2.<input
type="checkbox" name="C2" value="ON"> 3.<input type="checkbox"
name="C3" value="ON"> 4.<input type="checkbox" name="C4" value="ON"> 5.<input
type="checkbox" name="C5" value="ON"> 6.<input type="checkbox" name="C6" value="ON">
7.<input type="checkbox" name="C7" value="ON"> 8.<input type="checkbox"
name="C8" value="ON"><input type="button" value="确认" name="B1" onClick="judge1()"></p>
</form>
<div id="err1div" style="display:'none'"><p><font color="#FF0000">做错了。再做一次!</font>
</p>
</div><div id="cor1div" style="display:'none'"><font color="#FF0000"><p></font><font
color="#0000FF">正确! 做得很好! </font></p>
</div><div id="hint1div" style="display:'none'"><p>正确答案是: 5, 6</p>
</div>
</blockquote>
<p align="center"><a href="javascript:close()">关闭</a></p>
</body>
</html>
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