彩票七星彩的选码规则，5个数字至少选2个，列出所有数字组合方法，未选择数字的列用“*”表示。
例子为：5*10表格，可自由选择数字，根据每列数字的选择情况，进行组合。
image.png
代码：
<!DOCTYPE html>
<html>
<head>
<title>数列组合方法</title>
</head>
<body>
<center>
<table width="400" border="1" id="table">
<tr>
<th align="center">第一列</th>
<th align="center">第二列</th>
<th align="center">第三列</th>
<th align="center">第四列</th>
<th align="center">第五列</th>
</tr>
<tr>
<td align="center"><button type="button" id="a" onClick="a0('a0', '0')">0</button><input type="text" value=" " id="a0"></td>
<td align="center"><button type="button" id="a" onClick="a1('a1', '0')">0</button><input type="text" value=" " id="a1"></td>
<td align="center"><button type="button" id="a" onClick="a2('a2', '0')">0</button><input type="text" value=" " id="a2"></td>
<td align="center"><button type="button" id="a" onClick="a3('a3', '0')">0</button><input type="text" value=" " id="a3"></td>
<td align="center"><button type="button" id="a" onClick="a4('a4', '0')">0</button><input type="text" value=" " id="a4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="b" onClick="b0('b0', '1')">1</button><input type="text" value=" " id="b0"></td>
<td align="center"><button type="button" id="b" onClick="b1('b1', '1')">1</button><input type="text" value=" " id="b1"></td>
<td align="center"><button type="button" id="b" onClick="b2('b2', '1')">1</button><input type="text" value=" " id="b2"></td>
<td align="center"><button type="button" id="b" onClick="b3('b3', '1')">1</button><input type="text" value=" " id="b3"></td>
<td align="center"><button type="button" id="b" onClick="b4('b4', '1')">1</button><input type="text" value=" " id="b4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="c" onClick="c0('c0', '2')">2</button><input type="text" value=" " id="c0"></td>
<td align="center"><button type="button" id="c" onClick="c1('c1', '2')">2</button><input type="text" value=" " id="c1"></td>
<td align="center"><button type="button" id="c" onClick="c2('c2', '2')">2</button><input type="text" value=" " id="c2"></td>
<td align="center"><button type="button" id="c" onClick="c3('c3', '2')">2</button><input type="text" value=" " id="c3"></td>
<td align="center"><button type="button" id="c" onClick="c4('c4', '2')">2</button><input type="text" value=" " id="c4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="d" onClick="d0('d0', '3')">3</button><input type="text" value=" " id="d0"></td>
<td align="center"><button type="button" id="d" onClick="d1('d1', '3')">3</button><input type="text" value=" " id="d1"></td>
<td align="center"><button type="button" id="d" onClick="d2('d2', '3')">3</button><input type="text" value=" " id="d2"></td>
<td align="center"><button type="button" id="d" onClick="d3('d3', '3')">3</button><input type="text" value=" " id="d3"></td>
<td align="center"><button type="button" id="d" onClick="d4('d4', '3')">3</button><input type="text" value=" " id="d4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="e" onClick="e0('e0', '4')">4</button><input type="text" value=" " id="e0"></td>
<td align="center"><button type="button" id="e" onClick="e1('e1', '4')">4</button><input type="text" value=" " id="e1"></td>
<td align="center"><button type="button" id="e" onClick="e2('e2', '4')">4</button><input type="text" value=" " id="e2"></td>
<td align="center"><button type="button" id="e" onClick="e3('e3', '4')">4</button><input type="text" value=" " id="e3"></td>
<td align="center"><button type="button" id="e" onClick="e4('e4', '4')">4</button><input type="text" value=" " id="e4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="f" onClick="f0('f0', '5')">5</button><input type="text" value=" " id="f0"></td>
<td align="center"><button type="button" id="f" onClick="f1('f1', '5')">5</button><input type="text" value=" " id="f1"></td>
<td align="center"><button type="button" id="f" onClick="f2('f2', '5')">5</button><input type="text" value=" " id="f2"></td>
<td align="center"><button type="button" id="f" onClick="f3('f3', '5')">5</button><input type="text" value=" " id="f3"></td>
<td align="center"><button type="button" id="f" onClick="f4('f4', '5')">5</button><input type="text" value=" " id="f4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="g" onClick="g0('g0', '6')">6</button><input type="text" value=" " id="g0"></td>
<td align="center"><button type="button" id="g" onClick="g1('g1', '6')">6</button><input type="text" value=" " id="g1"></td>
<td align="center"><button type="button" id="g" onClick="g2('g2', '6')">6</button><input type="text" value=" " id="g2"></td>
<td align="center"><button type="button" id="g" onClick="g3('g3', '6')">6</button><input type="text" value=" " id="g3"></td>
<td align="center"><button type="button" id="g" onClick="g4('g4', '6')">6</button><input type="text" value=" " id="g4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="h" onClick="h0('h0', '7')">7</button><input type="text" value=" " id="h0"></td>
<td align="center"><button type="button" id="h" onClick="h1('h1', '7')">7</button><input type="text" value=" " id="h1"></td>
<td align="center"><button type="button" id="h" onClick="h2('h2', '7')">7</button><input type="text" value=" " id="h2"></td>
<td align="center"><button type="button" id="h" onClick="h3('h3', '7')">7</button><input type="text" value=" " id="h3"></td>
<td align="center"><button type="button" id="h" onClick="h4('h4', '7')">7</button><input type="text" value=" " id="h4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="i" onClick="i0('i0', '8')">8</button><input type="text" value=" " id="i0"></td>
<td align="center"><button type="button" id="i" onClick="i1('i1', '8')">8</button><input type="text" value=" " id="i1"></td>
<td align="center"><button type="button" id="i" onClick="i2('i2', '8')">8</button><input type="text" value=" " id="i2"></td>
<td align="center"><button type="button" id="i" onClick="i3('i3', '8')">8</button><input type="text" value=" " id="i3"></td>
<td align="center"><button type="button" id="i" onClick="i4('i4', '8')">8</button><input type="text" value=" " id="i4"></td>
</tr>
<tr>
<td align="center"><button type="button" id="j" onClick="j0('j0', '9')">9</button><input type="text" value=" " id="j0"></td>
<td align="center"><button type="button" id="j" onClick="j1('j1', '9')">9</button><input type="text" value=" " id="j1"></td>
<td align="center"><button type="button" id="j" onClick="j2('j2', '9')">9</button><input type="text" value=" " id="j2"></td>
<td align="center"><button type="button" id="j" onClick="j3('j3', '9')">9</button><input type="text" value=" " id="j3"></td>
<td align="center"><button type="button" id="j" onClick="j4('j4', '9')">9</button><input type="text" value=" " id="j4"></td>
</tr>
</table>
<button onClick="onPrint()">打印</button>
<div id="myDiv"></div>
</center>
</body>
<script type="text/javascript">
// 全局变量
var arr0 = [] // [a0,b0,c0,d0,e0,f0,g0,h0,i0,j0]
var arr1 = [] // [a1,b1,c1,d1,e1,f1,g1,h1,i1,j1]
var arr2 = [] // [a2,b2,c2,d2,e2,f2,g2,h2,i2,j2]
var arr3 = [] // [a3,b3,c3,d3,e3,f3,g3,h3,i3,j3]
var arr4 = [] // [a4,b4,c4,d4,e4,f4,g4,h4,i4,j4]
var aArr0 = "", aArr1 = "", aArr2 = "", aArr3 = "", aArr4 = "";
var bArr0 = "", bArr1 = "", bArr2 = "", bArr3 = "", bArr4 = "";
var cArr0 = "", cArr1 = "", cArr2 = "", cArr3 = "", cArr4 = "";
var dArr0 = "", dArr1 = "", dArr2 = "", dArr3 = "", dArr4 = "";
var eArr0 = "", eArr1 = "", eArr2 = "", eArr3 = "", eArr4 = "";
var fArr0 = "", fArr1 = "", fArr2 = "", fArr3 = "", fArr4 = "";
var gArr0 = "", gArr1 = "", gArr2 = "", gArr3 = "", gArr4 = "";
var hArr0 = "", hArr1 = "", hArr2 = "", hArr3 = "", hArr4 = "";
var iArr0 = "", iArr1 = "", iArr2 = "", iArr3 = "", iArr4 = "";
var jArr0 = "", jArr1 = "", jArr2 = "", jArr3 = "", jArr4 = "";
function a0(val, num){ aArr0 = a(val, num) }
function a1(val, num){ aArr1 = a(val, num) }
function a2(val, num){ aArr2 = a(val, num) }
function a3(val, num){ aArr3 = a(val, num) }
function a4(val, num){ aArr4 = a(val, num) }
function b0(val, num){ bArr0 = a(val, num) }
function b1(val, num){ bArr1 = a(val, num) }
function b2(val, num){ bArr2 = a(val, num) }
function b3(val, num){ bArr3 = a(val, num) }
function b4(val, num){ bArr4 = a(val, num) }
function c0(val, num){ cArr0 = a(val, num) }
function c1(val, num){ cArr1 = a(val, num) }
function c2(val, num){ cArr2 = a(val, num) }
function c3(val, num){ cArr3 = a(val, num) }
function c4(val, num){ cArr4 = a(val, num) }
function d0(val, num){ dArr0 = a(val, num) }
function d1(val, num){ dArr1 = a(val, num) }
function d2(val, num){ dArr2 = a(val, num) }
function d3(val, num){ dArr3 = a(val, num) }
function d4(val, num){ dArr4 = a(val, num) }
function e0(val, num){ eArr0 = a(val, num) }
function e1(val, num){ eArr1 = a(val, num) }
function e2(val, num){ eArr2 = a(val, num) }
function e3(val, num){ eArr3 = a(val, num) }
function e4(val, num){ eArr4 = a(val, num) }
function f0(val, num){ fArr0 = a(val, num) }
function f1(val, num){ fArr1 = a(val, num) }
function f2(val, num){ fArr2 = a(val, num) }
function f3(val, num){ fArr3 = a(val, num) }
function f4(val, num){ fArr4 = a(val, num) }
function g0(val, num){ gArr0 = a(val, num) }
function g1(val, num){ gArr1 = a(val, num) }
function g2(val, num){ gArr2 = a(val, num) }
function g3(val, num){ gArr3 = a(val, num) }
function g4(val, num){ gArr4 = a(val, num) }
function h0(val, num){ hArr0 = a(val, num) }
function h1(val, num){ hArr1 = a(val, num) }
function h2(val, num){ hArr2 = a(val, num) }
function h3(val, num){ hArr3 = a(val, num) }
function h4(val, num){ hArr4 = a(val, num) }
function i0(val, num){ iArr0 = a(val, num) }
function i1(val, num){ iArr1 = a(val, num) }
function i2(val, num){ iArr2 = a(val, num) }
function i3(val, num){ iArr3 = a(val, num) }
function i4(val, num){ iArr4 = a(val, num) }
function j0(val, num){ jArr0 = a(val, num) }
function j1(val, num){ jArr1 = a(val, num) }
function j2(val, num){ jArr2 = a(val, num) }
function j3(val, num){ jArr3 = a(val, num) }
function j4(val, num){ jArr4 = a(val, num) }
// $('id')来实现document.getElementById('id')
function $() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') element = document.getElementById(element);
if (arguments.length == 1) return element;
elements.push(element);
}
return elements;
}
function a(val, num){
$(val).value == " " ? $(val).value=num : $(val).value=" "; // 再次点击清空
return $(val).value;
}
function onPrint() {
arr0 = toStarts(aArr0, bArr0, cArr0, dArr0, eArr0, fArr0, gArr0, hArr0, iArr0, jArr0);
arr1 = toStarts(aArr1, bArr1, cArr1, dArr1, eArr1, fArr1, gArr1, hArr1, iArr1, jArr1);
arr2 = toStarts(aArr2, bArr2, cArr2, dArr2, eArr2, fArr2, gArr2, hArr2, iArr2, jArr2);
arr3 = toStarts(aArr3, bArr3, cArr3, dArr3, eArr3, fArr3, gArr3, hArr3, iArr3, jArr3);
arr4 = toStarts(aArr4, bArr4, cArr4, dArr4, eArr4, fArr4, gArr4, hArr4, iArr4, jArr4);
// 至少选择两列
if (arr0.length && (arr1.length || arr2.length || arr3.length || arr4.length)) {
// console.log(1)
} else if (arr1.length && (arr0.length || arr2.length || arr3.length || arr4.length)) {
// console.log(2)
} else if (arr2.length && (arr0.length || arr1.length || arr3.length || arr4.length)) {
// console.log(3)
} else if (arr3.length && (arr0.length || arr2.length || arr1.length || arr4.length)) {
// console.log(4)
} else if (arr4.length && (arr0.length || arr2.length || arr3.length || arr1.length)) {
// console.log(5)
} else {
alert("至少选择两列中的数字")
return false
}
// 某一列没有选择赋值为“*”
arr0 = arr0.length ? arr0 : ["*"]
arr1 = arr1.length ? arr1 : ["*"]
arr2 = arr2.length ? arr2 : ["*"]
arr3 = arr3.length ? arr3 : ["*"]
arr4 = arr4.length ? arr4 : ["*"]
var arr = [arr0, arr1, arr2, arr3, arr4];
console.log(arr)
$("myDiv").innerHTML = doExchange(arr).join("<br />"); // 网页换行
}
// 去空值
function toStarts(a, b, c, d, e, f, g, h, i, j) {
let list = [a, b, c, d, e, f, g, h, i, j]
return list.filter(function (s) {
return s && s.trim();
})
}
// 返回组合的数组
function doExchange(arr){
var len = arr.length;
// 当数组大于等于2个的时候
if(len >= 2){
// 第一个数组的长度
var len1 = arr[0].length;
// 第二个数组的长度
var len2 = arr[1].length;
// 2个数组产生的组合数
var lenBoth = len1 * len2;
// 申明一个新数组
var items = new Array(lenBoth);
// 申明新数组的索引
var index = 0;
for (var i=0; i<len1; i++) {
for (var j=0; j<len2; j++) {
if(arr[0][i] instanceof Array){
items[index] = arr[0][i].concat(arr[1][j]);
}else{
items[index] = [arr[0][i]].concat(arr[1][j]);
}
index++;
}
}
var newArr = new Array(len -1);
for(var i=2;i<arr.length;i++) {
newArr[i-1] = arr[i];
}
newArr[0] = items;
return doExchange(newArr); // 递归
}else{
return arr[0];
}
}
// 数组组合方法参考 https://www.cnblogs.com/linJie1930906722/p/6854517.html
</script>
<style>
input {
width: 40px;
}
</style>
</html>
