一个不错的JS“算24”的代码

junstudio

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1^# 大中小发表于 2008-1-31 15:46 只看该作者

一个不错的JS“算24”的代码

<<span href="tag.php?name=html" onclick="tagshow(event)" class="t_tag">html</span>><head>
<meta http-equiv="Content-Type" content="text/<span href="tag.php?name=html" onclick="tagshow(event)" class="t_tag">html</span>; charset=gb2312">
<title>24</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()
{
	
	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))
								{						
									result.value=(str);
									return;
								}
								str = num[n1]+  sign[s1]  +"("+num[n2]+  sign[s2]  +num[n3]+")"+  sign[s3]  +num[n4];
								if(judgeNum(str))
								{					
									result.value=(str);
									return;
								}								
								str = "("+num[n1]+  sign[s1]  +num[n2]+")"+  sign[s2]  +num[n3]+  sign[s3]  +num[n4];
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}								
								str = num[n1]+  sign[s1]  +num[n2]+  sign[s2]  +"("+num[n3]+  sign[s3]  +num[n4]+")";
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}
								str = num[n1]+  sign[s1]  +"("+num[n2]+  sign[s2]  +num[n3]+  sign[s3]  +num[n4]+")";
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}
								str = "("+num[n1]+  sign[s1]  +num[n2]+  sign[s2]  +num[n3]+")"+  sign[s3]	+num[n4];							
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}								
								str = "("+num[n1]+  sign[s1]  +num[n2]+")"+ sign[s2]  +"("+num[n3]+  sign[s3]  +num[n4]+")";
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}															
								str = "("+num[n1]+  sign[s1]  +"("+num[n2]+  sign[s2]  +num[n3]+"))"+  sign[s3]  +num[n4];
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}								
								str = "(("+num[n1]+  sign[s1]  +num[n2]+")"+ sign[s2]  +num[n3]+")"+  sign[s3]  +num[n4];
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}								
								str = num[n1]+  sign[s1]  +"("+num[n2]+  sign[s2]  +"("+num[n3]+  sign[s3]  +num[n4]+"))";
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}								
								str = num[n1]+  sign[s1]  +"(("+num[n2]+  sign[s2]  +num[n3]+")"+  sign[s3]   +num[n4]+")";	
								if(judgeNum(str))
								{
									result.value=(str);
									return;
								}	
										
																		
							}									
							
						}									
							
					}
				}
			}
		}
	}
	
	result.value=("这个好像不行吧~~~~");
}	function judgeNum(theline)
{
	if(eval(theline)==24)
		return true;
	else
		return false;	
}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="192" 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="60" align="center" bgcolor="#0099CC" style="color: #FFFFFF"><a href="javascript:;" onclick=RunSZ()>计算结果</a></td>
      <td width="226" height="60" align="center" bgcolor="#0099CC"><input type="text" id="result" size="25"></td>
    </tr>
  </table>
  </center>
</div>
</body></<span href="tag.php?name=html" onclick="tagshow(event)" class="t_tag">html</span>>

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