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24点
好素材网 www.HaoSc.com 02月22日 11:49
[查看演示]  源码如下
----------------------------------------------------------
<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>24－www.51windows.Net</title>
<style>
INPUT{border: 1 solid #0099CC;}
</style>
</head>

<body link="#FFFFFF" vlink="#FFFFFF" alink="#FFFFFF">
<script>
/*-------------------------------------
原理阐述：

四个数字，判断怎样得到 24 可能而且没有重复的组合方式如下：

可能的组合方式
a+b+c+d
a+(b+c)+d
(a+b)+c+d
a+b+(c+d)
a+(b+c+d)
(a+b+c)+d
(a+b)+(c+d)
(a+(b+c))+d
((a+b)+c)+d
a+(b+(c+d))
a+((b+c)+d)

依据这个规律，我们可以得出…… 下面这段代码~~ 哈哈……

---------------------------------------*/
var num = null;

var sign = new Array("+","-","*","/");

function returnSZ()
{
var allstr = "";

for(s1=0; s1<4; s1++)
{
for(s2=0; s2<4; s2++)
{
for(s3=0; s3<4; s3++)
{
for(n1=0; n1<4; n1++)
{
for(n2=0; n2<4; n2++)
{
if(n2==n1)
continue;

for(n3=0; n3<4; n3++)
{
if(n3==n1||n3==n2)
continue;

for(n4=0; n4<4; n4++)
{
if(n4==n1||n4==n2||n4==n3)
continue;

var str = "";

/*--------------------- 可能的组合方式
a+b+c+d
a+(b+c)+d
(a+b)+c+d
a+b+(c+d)
a+(b+c+d)
(a+b+c)+d
(a+b)+(c+d)
(a+(b+c))+d
((a+b)+c)+d
a+(b+(c+d))
a+((b+c)+d)
----------------------*/

str = num[n1]+ sign[s1] +num[n2]+ sign[s2] +num[n3]+ sign[s3] +num[n4];
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = num[n1]+ sign[s1] +"("+num[n2]+ sign[s2] +num[n3]+")"+ sign[s3] +num[n4];
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = "("+num[n1]+ sign[s1] +num[n2]+")"+ sign[s2] +num[n3]+ sign[s3] +num[n4];
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = num[n1]+ sign[s1] +num[n2]+ sign[s2] +"("+num[n3]+ sign[s3] +num[n4]+")";
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = num[n1]+ sign[s1] +"("+num[n2]+ sign[s2] +num[n3]+ sign[s3] +num[n4]+")";
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = "("+num[n1]+ sign[s1] +num[n2]+ sign[s2] +num[n3]+")"+ sign[s3] +num[n4];
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = "("+num[n1]+ sign[s1] +num[n2]+")"+ sign[s2] +"("+num[n3]+ sign[s3] +num[n4]+")";
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = "("+num[n1]+ sign[s1] +"("+num[n2]+ sign[s2] +num[n3]+"))"+ sign[s3] +num[n4];
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = "(("+num[n1]+ sign[s1] +num[n2]+")"+ sign[s2] +num[n3]+")"+ sign[s3] +num[n4];
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = num[n1]+ sign[s1] +"("+num[n2]+ sign[s2] +"("+num[n3]+ sign[s3] +num[n4]+"))";
if(judgeNum(str))
{
allstr +=(str)+"\n";
}
str = num[n1]+ sign[s1] +"(("+num[n2]+ sign[s2] +num[n3]+")"+ sign[s3] +num[n4]+")";
if(judgeNum(str))
{
allstr +=(str)+"\n";
}


}

}

}
}
}
}
}

if(allstr!="")
result.value = allstr;
else
result.value=("这个好像不行吧~~~~");
}


function RunSZ()
{
var ArrayBox = document.getElementsByName("box");

num = null;

num = new Array();

for(i=0;i<4;i++)
{
var str = ArrayBox[i].value;

if(str=="")
{
alert("第"+(i+1)+"个数字没有填");
ArrayBox[i].focus();
return;
}
else
{
if(!str.match(/\D/g))
num[i] = ArrayBox[i].value;
else
{
alert("第"+(i+1)+"个数字有不为数字的字符");
ArrayBox[i].focus();
return;
}
}
}


returnSZ();

}

</script>
<div align="center">
<table border="0" width="324" style="font-family: 宋体; font-size: 9pt; border: 1 solid #0099CC" height="200" cellspacing="0" cellpadding="0">
<tr>
<td width="308" height="28" align="center" bgcolor="#0099CC" style="color: #FFFFFF" colspan="2">
<p align="left">|| 24 点 游戏</td>
</tr>
<center>
<tr>
<td width="82" height="40" align="center" bgcolor="#0099CC" style="color: #FFFFFF; border-top: 1 solid #DDFFEF">第一个数字</td>
<td width="226" height="40" align="center" bgcolor="#DDFFEF"><input type="text" name="box" size="20" ></td>
</tr>
<tr>
<td width="82" height="40" align="center" bgcolor="#0099CC" style="color: #FFFFFF">第一个数字</td>
<td width="226" height="40" align="center" bgcolor="#DDFFEF"><input type="text" name="box" size="20"></td>
</tr>
<tr>
<td width="82" height="40" align="center" bgcolor="#0099CC" style="color: #FFFFFF">第三个数字</td>
<td width="226" height="40" align="center" bgcolor="#DDFFEF"><input type="text" name="box" size="20"></td>
</tr>
<tr>
<td width="82" height="40" align="center" bgcolor="#0099CC" style="color: #FFFFFF; border-bottom: 1 solid #DDFFEF">第四个数字</td>
<td width="226" height="40" align="center" bgcolor="#DDFFEF"><input type="text" name="box" size="20"></td>
</tr>
<tr>
<td width="82" height="68" align="center" bgcolor="#0099CC" style="color: #FFFFFF"><button onclick=RunSZ()>计算结果</button></td>
<td width="226" height="68" align="center" bgcolor="#0099CC"><br>
<textarea id="result" rows="4" cols="29"></textarea><br>
<br>
</td>
</tr>
</table>
</center>
</div>
</body>
<script language=vbs>
function judgeNum(theline)
on error resume next
judgeNum=false
judgeNum=cstr(eval(theline))=24
end function
</script>
</html>

<div style="position: absolute; top: 10; right: 10; width: 148; height: 18;cursor:hand">
<input type="button" name="Button" value="查看源代码" onClick= 'window.location = "view-source:" + window.location.href'></div>

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