你可以使用一个简单的映射关系来简化你的代码。首先，你可以创建一个对象，将天干和对应的索引值进行映射，然后使用这些索引值来获取相应的十神。

下面是一个简化的示例代码：

[JavaScript] 纯文本查看 复制代码

var shishen = ["比肩", "劫财", "食神", "伤官", "偏财", "正财", "七杀", "正官", "偏印", "正印"];
var tg = ["甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"];

function qshishen(rizhu, tiangan) {
  var rizhuIndex = tg.indexOf(rizhu);
  var tianganIndex = tg.indexOf(tiangan);
  
  if (rizhuIndex !== -1 && tianganIndex !== -1) {
    var shishenIndex = (rizhuIndex + tianganIndex) % 10;
    return shishen[shishenIndex];
  } else {
    return "提交参数错误";
  }
}

// 示例用法
var rizhu = "甲";
var tiangan = "丙";
var result = qshishen(rizhu, tiangan);
console.log(result); // 输出：食神

这样，你只需要使用两个索引值进行计算，而不需要逐个判断每个组合。注意，这个示例代码只处理了甲到癸的情况，如果需要处理更多的组合，你可以根据这个思路进行扩展。

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var shishen = ["比肩", "劫财", "食神", "伤官", "偏财", "正财", "七杀", "正官", "偏印", "正印"];  
var tg = ["甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"];  

function qshishen (rizhu, tiangan) {  
var rizhuIndex = tg.indexOf (rizhu);  
var tianganIndex = tg.indexOf (tiangan);  

if (rizhuIndex === -1 || tianganIndex === -1) {  
return document.write ("提交参数错误
");  
}  
const shishenIndex = `${rizhuIndex}${tianganIndex}`;
if ([ ' 00', '11', '22', '33', '44', '55', '66', '77', '88', '99'].includes(shishenIndex)) {
//return document.write (shishen[0] + "
");
return document.write (rizhu+tiangan+" "+shishen[0] + "
");
}
else if ([ ' 01', '10', '23', '32', '45', '54', '67', '76', '89', '98'].includes(shishenIndex)) {
//return document.write (shishen[1] + "
");
return document.write (rizhu+tiangan+" "+shishen[1] + "
");
}
else if ([ ' 02', '13', '24', '35', '46', '57', '68', '79', '80', '91'].includes(shishenIndex)) {
//return document.write (shishen[2] + "
");
return document.write (rizhu+tiangan+" "+shishen[2] + "
");
}
else if ([ ' 03', '12', '25', '34', '47', '56', '69', '78', '81', '90'].includes(shishenIndex)) {
//return document.write (shishen[3] + "
");
return document.write (rizhu+tiangan+" "+shishen[3] + "
");
}
else if ([ ' 04', '15', '26', '37', '48', '59', '60', '71', '82', '93'].includes(shishenIndex)) {
//return document.write (shishen[4] + "
");
return document.write (rizhu+tiangan+" "+shishen[4] + "
");
}  
else if ([ ' 05', '14', '27', '36', '49', '58', '61', '70', '83', '92'].includes(shishenIndex)) {
//return document.write (shishen[5] + "
");
return document.write (rizhu+tiangan+" "+shishen[5] + "
");
}  
else if ([ ' 06', '17', '28', '39', '40', '51', '62', '73', '84', '95'].includes(shishenIndex)) {
//return document.write (shishen[6] + "
");
return document.write (rizhu+tiangan+" "+shishen[6] + "
");
}  
else if ([ ' 07', '16', '29', '38', '41', '50', '63', '72', '85', '94'].includes(shishenIndex)) {
//return document.write (shishen[7] + "
");
return document.write (rizhu+tiangan+" "+shishen[7] + "
");
}
else if ([ ' 08', '19', '20', '31', '42', '53', '64', '75', '86', '97'].includes(shishenIndex)) {
// return document.write (shishen[8] + "
");
return document.write (rizhu+tiangan+" "+shishen[8] + "
");
}
else if ([ ' 09', '18', '21', '30', '43', '52', '65', '74', '87', '96'].includes(shishenIndex)) {
//return document.write (shishen[9] + "
");
return document.write (rizhu+tiangan+" "+shishen[9] + "
");
}

}

var shishen = ["比肩", "劫财", "食神", "伤官", "偏财", "正财", "七杀", "正官", "偏印", "正印"];  <br /> var tg = ["甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"];  <br />    <br /> function qshishen(rizhu, tiangan) {  <br />   var rizhuIndex = tg.indexOf(rizhu);  <br />   var tianganIndex = tg.indexOf(tiangan);  <br />    <br />   if (rizhuIndex === -1 || tianganIndex === -1) {  <br />     return document.write("提交参数错误<br /> ");  <br />   }  <br /> <br /> const shishenIndex = `${rizhuIndex}${tianganIndex}`;<br /> if (['00', '11', '22', '33', '44', '55', '66', '77', '88', '99'].includes(shishenIndex)) {<br />    //return document.write(shishen[0] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[0] + "<br /> ");<br /> }<br /> else if (['01', '10', '23', '32', '45', '54', '67', '76', '89', '98'].includes(shishenIndex)) {<br />    //return document.write(shishen[1] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[1] + "<br /> ");<br /> }<br /> else if (['02', '13', '24', '35', '46', '57', '68', '79', '80', '91'].includes(shishenIndex)) {<br />   //return document.write(shishen[2] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[2] + "<br /> ");<br />   }<br /> else if (['03', '12', '25', '34', '47', '56', '69', '78', '81', '90'].includes(shishenIndex)) {<br />    //return document.write(shishen[3] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[3] + "<br /> ");<br />   }<br /> else if (['04', '15', '26', '37', '48', '59', '60', '71', '82', '93'].includes(shishenIndex)) {<br />    //return document.write(shishen[4] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[4] + "<br /> ");<br />   }  <br /> else if (['05', '14', '27', '36', '49', '58', '61', '70', '83', '92'].includes(shishenIndex)) {<br />    //return document.write(shishen[5] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[5] + "<br /> ");<br />   }  <br /> else if (['06', '17', '28', '39', '40', '51', '62', '73', '84', '95'].includes(shishenIndex)) {<br />    //return document.write(shishen[6] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[6] + "<br /> ");<br />   }  <br /> else if (['07', '16', '29', '38', '41', '50', '63', '72', '85', '94'].includes(shishenIndex)) {<br />    //return document.write(shishen[7] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[7] + "<br /> ");<br />   }<br /> else if (['08', '19', '20', '31', '42', '53', '64', '75', '86', '97'].includes(shishenIndex)) {<br />   // return document.write(shishen[8] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[8] + "<br /> ");<br />   }<br /> else if (['09', '18', '21', '30', '43', '52', '65', '74', '87', '96'].includes(shishenIndex)) {<br />    //return document.write(shishen[9] + "<br /> ");<br />    return document.write(rizhu+tiangan+" "+shishen[9] + "<br /> ");<br />   }<br /> <br />   <br /> }

[JavaScript] 纯文本查看 复制代码

var shishen=["比肩","劫财","食神","伤官","偏财","正财","七杀","正官","偏印","正印"];
var tg=["甲","乙","丙","丁","戊","己","庚","辛","壬","癸"];
var dz=["子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"];

function qshishen(rizhu,tiangan) {
        if (rizhu.includes("甲") && tiangan.includes("甲") ||
            rizhu.includes("乙") && tiangan.includes("乙") || 
            rizhu.includes("丙") && tiangan.includes("丙") ||
            rizhu.includes("丁") && tiangan.includes("丁") ||
            rizhu.includes("戊") && tiangan.includes("戊") ||
            rizhu.includes("己") && tiangan.includes("己") ||
            rizhu.includes("庚") && tiangan.includes("庚") ||
            rizhu.includes("辛") && tiangan.includes("辛") ||
            rizhu.includes("壬") && tiangan.includes("壬") ||
            rizhu.includes("癸") && tiangan.includes("癸") 
){
                return document.write(shishen[0]+ "<br>")
                //return dinren[yuefen1];
        }
        else if (rizhu.includes("甲") && tiangan.includes("乙") ||
                 rizhu.includes("乙") && tiangan.includes("甲") || 
                 rizhu.includes("丙") && tiangan.includes("丁") 
                 //后面按照这个格式写就行

){
                return document.write(shishen[1]+ "<br>")
        }        
        else if (rizhu.includes("甲") && tiangan.includes("丙")){
                return document.write(shishen[2]+ "<br>")        
        }        
        else if (rizhu.includes("甲") && tiangan.includes("丁")){
                return document.write(shishen[3]+ "<br>")
        }        
        else if (rizhu.includes("甲") && tiangan.includes("戊")){
                return document.write(shishen[4]+ "<br>")        
        }
        else if (rizhu.includes("甲") && tiangan.includes("己")){
                return document.write(shishen[5]+ "<br>")        
        }
        else if (rizhu.includes("甲") && tiangan.includes("庚")){
                return document.write(shishen[6]+ "<br>")        
        }
        else if (rizhu.includes("甲") && tiangan.includes("辛")){
                return document.write(shishen[7]+ "<br>")        
        }
        else if (rizhu.includes("甲") && tiangan.includes("壬")){
                return document.write(shishen[8]+ "<br>")        
        }
        else if (rizhu.includes("甲") && tiangan.includes("癸")){
                return document.write(shishen[9]+ "<br>")        
        } // 这样后面还有9个天干对比 这么写肯定不对，只是我不会写，如何用简单的代码 表达出来
        else if (rizhu.includes("乙") && tiangan.includes("甲")){
                return document.write(shishen[1]+ "<br>")        
        }
        else{
                return document.write("提交参数错误<br>")
        }
}

你的代码可以通过使用数组索引来简化，从而避免大量的 else if 语句。首先，你可以将天干和地支转换为数组索引，然后使用这些索引来访问 shishen 数组中的相应元素。以下是一个简化的版本：

[JavaScript] 纯文本查看 复制代码

var shishen = ["比肩", "劫财", "食神", "伤官", "偏财", "正财", "七杀", "正官", "偏印", "正印"];  
var tg = ["甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"];  
  
function qshishen(rizhu, tiangan) {  
  var rizhuIndex = tg.indexOf(rizhu);  
  var tianganIndex = tg.indexOf(tiangan);  
  
  if (rizhuIndex === -1 || tianganIndex === -1) {  
    return document.write("提交参数错误<br>");  
  }  
  
  var shishenIndex = (rizhuIndex + tianganIndex) % 10; // 使用模运算确保索引在0-9之间  
  return document.write(shishen[shishenIndex] + "<br>");  
}

这个代码首先查找 rizhu 和 tiangan 在 tg 数组中的索引。如果它们不在数组中（即索引为 -1），则输出错误消息。否则，它将两个索引相加，并使用模运算确保结果在 0 到 9 之间，然后用这个索引来从 shishen 数组中获取相应的元素。

由文心大模型3.5生成 请自测