数独(JS和HTML) [英] Sudoku in JS and HTML
本文介绍了数独(JS和HTML)的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试在JS中随机填充一个二维数组，但我想让每一行和每一列中生成的数字都是唯一的.这是我的进展.这可以用于3x3网格，我的意思是随机生成的数字，但是我想要像真正的数独一样的9x9大小.谢谢.
I am trying to randomly fill a 2 dimensional array in JS but i want to have the numbers generated in each row and column to be unique.Here is my progression.This can do it for 3x3 grid I mean randomly generated numbers but I want the size of 9x9 like a real sudoku.Thanx.
//create table
function UpdateTable() {
var arr = [];
while(arr.length < 10){
var randomnumber = Math.floor(Math.random()*10);
if(arr.indexOf(randomnumber) > -1 ) continue;
arr[arr.length] = randomnumber;
}
tmp1 = 'cell' + 1;
tmp2 = 'cell' + 2;
tmp3 = 'cell' + 3;
tmp4 = 'cell' + 4;
tmp5 = 'cell' + 5;
tmp6 = 'cell' + 6;
tmp7 = 'cell' + 7;
tmp8 = 'cell' + 8;
tmp9 = 'cell' + 9;
var temp = [tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8, tmp9];
for (var i = 0; i < 10; i++) {
document.getElementById(temp[i]).innerHTML = arr[i];
}
}
UpdateTable();<center>
<div id="container">
<div id="header">
<h1>Welcome</h1>
</div>
<div id="content">
<table border="1" id="lotto">
<tr class="tr1">
<td class="normal" id="cell1"> </td>
<td class="normal" id="cell2"> </td>
<td class="normal" id="cell3"> </td>
</tr>
<tr class="tr2">
<td class="normal" id="cell4"> </td>
<td class="normal" id="cell5"> </td>
<td class="normal" id="cell6"> </td>
</tr>
<tr class="tr3">
<td class="normal" id="cell7"> </td>
<td class="normal" id="cell8"> </td>
<td class="normal" id="cell9"> </td>
</tr>
</table>
</div>
</div>
<input type="button" value="Re-generate Numbers" onclick="UpdateTable();" />
</center>推荐答案
请检查以下代码:
// we start with an empty sudoku...
var sudoku = new Array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
// ... and we solve it!!
solve(sudoku);
// given a sudoku cell, returns the row
function returnRow(cell) {
return Math.floor(cell / 9);
}
// given a sudoku cell, returns the column
function returnCol(cell) {
return cell % 9;
}
// given a sudoku cell, returns the 3x3 block
function returnBlock(cell) {
return Math.floor(returnRow(cell) / 3) * 3 + Math.floor(returnCol(cell) / 3);
}
// given a number, a row and a sudoku, returns true if the number can be placed in the row
function isPossibleRow(number,row,sudoku) {
for (var i=0; i<=8; i++) {
if (sudoku[row*9+i] == number) {
return false;
}
}
return true;
}
// given a number, a column and a sudoku, returns true if the number can be placed in the column
function isPossibleCol(number,col,sudoku) {
for (var i=0; i<=8; i++) {
if (sudoku[col+9*i] == number) {
return false;
}
}
return true;
}
// given a number, a 3x3 block and a sudoku, returns true if the number can be placed in the block
function isPossibleBlock(number,block,sudoku) {
for (var i=0; i<=8; i++) {
if (sudoku[Math.floor(block/3)*27+i%3+9*Math.floor(i/3)+3*(block%3)] == number) {
return false;
}
}
return true;
}
// given a cell, a number and a sudoku, returns true if the number can be placed in the cell
function isPossibleNumber(cell,number,sudoku) {
var row = returnRow(cell);
var col = returnCol(cell);
var block = returnBlock(cell);
return isPossibleRow(number,row,sudoku) && isPossibleCol(number,col,sudoku) && isPossibleBlock(number,block,sudoku);
}
// given a row and a sudoku, returns true if it's a legal row
function isCorrectRow(row,sudoku) {
var rightSequence = new Array(1,2,3,4,5,6,7,8,9);
var rowTemp= new Array();
for (var i=0; i<=8; i++) {
rowTemp[i] = sudoku[row*9+i];
}
rowTemp.sort();
return rowTemp.join() == rightSequence.join();
}
// given a column and a sudoku, returns true if it's a legal column
function isCorrectCol(col,sudoku) {
var rightSequence = new Array(1,2,3,4,5,6,7,8,9);
var colTemp= new Array();
for (var i=0; i<=8; i++) {
colTemp[i] = sudoku[col+i*9];
}
colTemp.sort();
return colTemp.join() == rightSequence.join();
}
// given a 3x3 block and a sudoku, returns true if it's a legal block
function isCorrectBlock(block,sudoku) {
var rightSequence = new Array(1,2,3,4,5,6,7,8,9);
var blockTemp= new Array();
for (var i=0; i<=8; i++) {
blockTemp[i] = sudoku[Math.floor(block/3)*27+i%3+9*Math.floor(i/3)+3*(block%3)];
}
blockTemp.sort();
return blockTemp.join() == rightSequence.join();
}
// given a sudoku, returns true if the sudoku is solved
function isSolvedSudoku(sudoku) {
for (var i=0; i<=8; i++) {
if (!isCorrectBlock(i,sudoku) || !isCorrectRow(i,sudoku) || !isCorrectCol(i,sudoku)) {
return false;
}
}
return true;
}
// given a cell and a sudoku, returns an array with all possible values we can write in the cell
function determinePossibleValues(cell,sudoku) {
var possible = new Array();
for (var i=1; i<=9; i++) {
if (isPossibleNumber(cell,i,sudoku)) {
possible.unshift(i);
}
}
return possible;
}
// given an array of possible values assignable to a cell, returns a random value picked from the array
function determineRandomPossibleValue(possible,cell) {
var randomPicked = Math.floor(Math.random() * possible[cell].length);
return possible[cell][randomPicked];
}
// given a sudoku, returns a two dimension array with all possible values
function scanSudokuForUnique(sudoku) {
var possible = new Array();
for (var i=0; i<=80; i++) {
if (sudoku[i] == 0) {
possible[i] = new Array();
possible[i] = determinePossibleValues(i,sudoku);
if (possible[i].length==0) {
return false;
}
}
}
return possible;
}
// given an array and a number, removes the number from the array
function removeAttempt(attemptArray,number) {
var newArray = new Array();
for (var i=0; i<attemptArray.length; i++) {
if (attemptArray[i] != number) {
newArray.unshift(attemptArray[i]);
}
}
return newArray;
}
// given a two dimension array of possible values, returns the index of a cell where there are the less possible numbers to choose from
function nextRandom(possible) {
var max = 9;
var minChoices = 0;
for (var i=0; i<=80; i++) {
if (possible[i]!=undefined) {
if ((possible[i].length<=max) && (possible[i].length>0)) {
max = possible[i].length;
minChoices = i;
}
}
}
return minChoices;
}
// given a sudoku, solves it
function solve(sudoku) {
var saved = new Array();
var savedSudoku = new Array();
var i=0;
var nextMove;
var whatToTry;
var attempt;
while (!isSolvedSudoku(sudoku)) {
i++;
nextMove = scanSudokuForUnique(sudoku);
if (nextMove == false) {
nextMove = saved.pop();
sudoku = savedSudoku.pop();
}
whatToTry = nextRandom(nextMove);
attempt = determineRandomPossibleValue(nextMove,whatToTry);
if (nextMove[whatToTry].length>1) {
nextMove[whatToTry] = removeAttempt(nextMove[whatToTry],attempt);
saved.push(nextMove.slice());
savedSudoku.push(sudoku.slice());
}
sudoku[whatToTry] = attempt;
}
showSudoku(sudoku,i);
}
function showSudoku(sudoku,i) {
var sudokuText = "<table border='1'>";
for (var i=0; i<=8; i++) {
sudokuText+="<tr>";
for (var j=0; j<=8; j++) {
sudokuText+="<td>";
sudokuText+=sudoku[i*9+j];
sudokuText+="</td>";
}
sudokuText+="</tr>";
}
sudokuText+="</table>";
document.write(sudokuText);
}table {
display:table;
border: 2px solid #444;
border-collapse: collapse;
position: relative;
}
table tr {
display:table-row;
position: relative;
z-index:-1;
}
table td{
display:table-cell;
padding:8px;
border: 1px solid #ff0000;
text-align: center;
}
table td:nth-child(3), table td:nth-child(6){border-right: 5px solid #555; } /*vertical*/
table tr:nth-child(3) td, table tr:nth-child(6) td{border-bottom: 5px solid #555;} /*horizontal*/我希望对您有所帮助.谢谢
I hope it might by helpful. Thanks
这篇关于数独(JS和HTML)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
