<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <meta name="GENERATOR" content="Microsoft FrontPage 4.0"> <meta name="ProgId" content="FrontPage.Editor.Document"> <title>24</title> <style> INPUT,TEXTAREA{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 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="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"><a href="javascript:;" onclick=RunSZ()>计算结果</a></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> </html> 载入中... 载入中...
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