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24-script-index.html
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24-script-index.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/w999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-w" />
<title>24 solver</title>
<script type="text/javascript">
var permvar = new Array(24);
permvar[0] = new Array('w','x','y','z');
permvar[1] = new Array('w','x','z','y');
permvar[2] = new Array('w','y','x','z');
permvar[3] = new Array('w','y','z','x');
permvar[4] = new Array('w','z','x','y');
permvar[5] = new Array('w','z','y','x');
permvar[6] = new Array('x','w','y','z');
permvar[7] = new Array('x','w','z','y');
permvar[8] = new Array('x','y','w','z');
permvar[9] = new Array('x','y','z','w');
permvar[10] = new Array('x','z','w','y');
permvar[11] = new Array('x','z','y','w');
permvar[12] = new Array('y','w','x','z');
permvar[13] = new Array('y','w','z','x');
permvar[14] = new Array('y','x','w','z');
permvar[15] = new Array('y','x','z','w');
permvar[16] = new Array('y','z','w','x');
permvar[17] = new Array('y','z','x','w');
permvar[18] = new Array('z','w','x','y');
permvar[19] = new Array('z','w','y','x');
permvar[20] = new Array('z','x','w','y');
permvar[21] = new Array('z','x','y','w');
permvar[22] = new Array('z','y','w','x');
permvar[23] = new Array('z','y','x','w');
var op = new Array('*','+','/','-');
function findSolution () {
var w = parseInt($('first').value);
if (!w) {alert('You must enter a value for w'); return;}
var x = parseInt($('second').value);
if (!x) {alert('You must enter a value for x'); return;}
var y = parseInt($('third').value);
if (!y) {alert('You must enter a value for y'); return;}
var z = parseInt($('fourth').value);
if (!z) {alert('You must enter a value for z'); return;}
var sol = swap(w,x,y,z);
if ($("debugCheck").checked) {
debug(sol[1]);
}
sol = replace(sol[0], w, x, y, z);
if (sol == 'no solution found.') {
$('solution').innerHTML = sol;
} else {
$('solution').innerHTML = sol + ' = 24';
}
return false;
}
function replace(sol, w, x, y, z) {
sol = sol.replace('x',x);
sol = sol.replace('y',y);
sol = sol.replace('w',w);
sol = sol.replace('z',z);
sol = sol.replace('*', '×');
return sol;
}
function debug(message) {
var text = $("debug").innerHTML;
$("debug").innerHTML = message;
}
function swap (w,x,y,z) {
$("debug").innerHTML = '';
if ($("debugCheck").checked) {
var checked = true;
}
var op1,op2,op3;
dummy = "";
for (i=0;i<24;i++) {
for (j=0;j<4;j++) {
op1 = op[j];
for (k=0;k<4;k++) {
op2 = op[k];
for (l=0;l<4;l++) {
op3 = op[l];
fu = permvar[i][0] + op1 + permvar[i][1] + op2 + permvar[i][2] + op3 + permvar[i][3];
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = '(' + permvar[i][0] + op1 + permvar[i][1] + ')' + op2 + permvar[i][2] + op3 + permvar[i][3];
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = permvar[i][0] + op1 + '(' + permvar[i][1] + op2 + permvar[i][2] + ')' + op3 + permvar[i][3];
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = permvar[i][0] + op1 + permvar[i][1] + op2 + '(' + permvar[i][2] + op3 + permvar[i][3] + ')';
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = '(' + permvar[i][0] + op1 + permvar[i][1]+ ')' + op2 + '(' + permvar[i][2] + op3 + permvar[i][3]+ ')';
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = '(' + permvar[i][0] + op1 + permvar[i][1] + op2 + permvar[i][2]+ ')' + op3 + permvar[i][3];
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = permvar[i][0] + op1 + '(' + permvar[i][1] + op2 + permvar[i][2] + op3 + permvar[i][3]+ ')';
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = '(' + '(' + permvar[i][0] + op1 + permvar[i][1]+ ')' + op2 + permvar[i][2]+ ')' + op3 + permvar[i][3];
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = permvar[i][0] + op1 + '(' + '(' + permvar[i][1] + op2 + permvar[i][2]+ ')' + op3 + permvar[i][3]+ ')';
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = '(' + permvar[i][0] + op1 + '(' +permvar[i][1] + op2 + permvar[i][2]+ ')'+ ')' + op3 + permvar[i][3];
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
fu = permvar[i][0] + op1 + '(' + permvar[i][1] + op2 + '(' +permvar[i][2] + op3 + permvar[i][3]+ ')'+ ')';
dummy += '<br/>' + replace(fu, w, x, y, z);
if ((f(w,x,y,z,fu)==24)) {
return [fu, dummy];
}
}
}
}
}
return ['no solution found.', dummy];
}
function $(e) {
return document.getElementById(e);
}
function f(w,x,y,z,fu) {
var myfunction = new Function("w","x","y","z", "return "+ fu + ";")
return myfunction(w,x,y,z,fu);
}
</script>
<style type="text/css">
html {
background: lightgrey;
height: 100%;
overflow: hidden;
}
body::-webkit-scrollbar {
width: 0.5em;
}
body::-webkit-scrollbar-track {
-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
}
body::-webkit-scrollbar-thumb {
background-color: darkgrey;
outline: 1px solid slategrey;
}
</style>
</head>
<body>
<h2>24 Solver by <a href="http://davidwees.com" target="_blank">David Wees</a></h2>
<p style="width:300px;">This script takes four numbers and attempts to find an arrangement of these four numbers and the arithmetic operations (× + − ÷) to make the value 24. <a href="https://www.24game.com/" target="_blank">See this page</a> for the original creators of the 24 game.</p>
<table style="width: 300px">
<tr><td colspan="2">
<form action="#">
Enter your numbers.<br />
<br /></td>
<tr>
<td><label>First number:</label></td>
<td><input type="text" id="first" /></td>
</tr>
<tr>
<td><label>Second number:</label></td>
<td><input type="text" id="second" /></td>
</tr>
<tr>
<td><label>Third number:</label></td>
<td><input type="text" id="third" /></td>
</tr>
<tr>
<td><label>Fourth number:</label></td>
<td><input type="text" id="fourth" /></td>
</tr>
<tr>
<td><br />Debug<input type="checkbox" id="debugCheck" /></td>
<td><br /><input type="submit" value="Find Solution" onclick="findSolution()"/></td>
</tr>
</form>
</table>
<br />
<span id="solutionLabel">Solution: </span>
<span id="solution"></span>
<div id="debug" style="position: absolute; left: 440px; top: 20px; width: 200px; height: 500px; overflow-y: scroll;"><div>
</body>
</html>