<!--CTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt--> <script>// <![CDATA[ function main() { var typestate; var exists= false; var numbervalue = new Array(); var evaltype = new Array(); var jisuanfua = new Array(); var jisuanfub = new Array(); var jisuanfuc = new Array(); var max=0; var Maxtypestate; var typestateOut; for (i=0;i<4;i++) { if (document.all('input0').value==''||document.all('input0').value.length<4||document.all('input0').value.length>4) { alert('必须把四个数字输全,只能输入最多4位数') return } else{ numbervalue[i]=document.all('input0').value.split("")[i]; } } evaltype[0]='+' evaltype[1]='-' evaltype[2]='*' evaltype[3]='/' for (t=0;t<4 ;t++ ) { jisuanfua[t]=evaltype[t] jisuanfub[t]=evaltype[t] jisuanfuc[t]=evaltype[t] } for (x=0;x<4 ;x++ ) { if(exists == true) return; for (y=0;y<4 ;y++) { for (z=0;z<4;z++) { ///下面开始组合方式 for (i=0;i<4;i++) { for (j=0;j<4;j++) { if (j==i) { continue }else{ for (k=0;k<4;k++) { if ((k==i)||(k==j)) { continue }else{ for (l=0;l<4;l++) { if ((l==i)||(l==j)||(l==k)) { continue }else{ typestate='('+numbervalue[i] + jisuanfua[x] + numbervalue[j] + ')'+jisuanfub[y] +'('+ numbervalue[k] + jisuanfuc[z] + numbervalue[l]+')' if (checkvalue(typestate)==10) { typestateOut =checkvalue( '('+numbervalue[i] + jisuanfua[x] + numbervalue[j] + ')+('+ numbervalue[k] + jisuanfuc[z] + numbervalue[l]+')+10'); if(typestateOut>max) { max = typestateOut; Maxtypestate=typestate; document.all.endtext.value=typestate+"=10 PT="+max; } exists=true ; break } else { typestate='('+'('+numbervalue[i] + jisuanfua[x] + numbervalue[j] +')'+ jisuanfub[y] + numbervalue[k] +')'+ jisuanfuc[z] + numbervalue[l] if (checkvalue(typestate)==10) { typestateOut = checkvalue('('+numbervalue[i] + jisuanfua[x] + numbervalue[j] +')+('+'('+numbervalue[i] + jisuanfua[x] + numbervalue[j] +')'+ jisuanfub[y] + numbervalue[k] +')+10'); if(typestateOut>max) { max = typestateOut; Maxtypestate=typestate; document.all.endtext.value=typestate+"=10 PT="+max ; } exists=true ; break } else { typestate='('+numbervalue[i] + jisuanfua[x] +'('+ numbervalue[j] + jisuanfub[y] + numbervalue[k] +')'+')'+ jisuanfuc[z] + numbervalue[l] if (checkvalue(typestate)==10) { typestateOut = checkvalue('('+ numbervalue[j] + jisuanfub[y] + numbervalue[k] +')+('+numbervalue[i] + jisuanfua[x] +'('+ numbervalue[j] + jisuanfub[y] + numbervalue[k] +')'+')+10'); if(typestateOut>max) { max = typestateOut; Maxtypestate=typestate; document.all.endtext.value=typestate+"=10 PT="+max ; } exists=true ; break ; } } } } } } } } } } //结束组合方式 } } } if (exists!='true') { document.all.endtext.value='这四个数不存在可能,请重新输入' } } function checkvalue(a) { var b b=eval(a) return (b) }function FnCheckInput(Evcode,Evid) { obj=Evid objvalue=document.all(Evid).value if ((Evcode<48)||(Evcode>57)) { window.setTimeout("FnWrite(obj,objvalue)",10); } }function FnWrite(Evid,Evvalue) { document.all(Evid).value=Evvalue } // ]]></script> <table border="1" cellspacing="0" cellpadding="0" width="75%" align="center"> <tbody> <tr> <td align="center">第一个数 <input onkeypress="FnCheckInput(event.keyCode,this.name)" name="input0" size="30" type="text" /></td> </tr> <tr> <td height="29" align="center">最终结果 <input name="endtext" readonly="readonly" size="30" type="text" /></td> </tr> <tr> <td height="29" align="center"><input onclick="main()" name="Submit" type="submit" value="检测" /></td> </tr> </tbody> </table>

提示：你可以先修改部分代码再运行。