53 lines
1.2 KiB
PHP
53 lines
1.2 KiB
PHP
<html>
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<style>
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body {
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font-family: courier, fixed, sans-serif;
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}
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h1 {
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font-size: 1.25em;
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}
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table, td {
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border: 1px #cccccc solid;
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}
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table {
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border-collapse: collapse;
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}
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td, th {
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padding: 0.3em 1em;
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font-size: 0.85em;
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}
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tbody tr:nth-child(odd) {
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background-color: #f3f3f3; /* zebra stripes */
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}
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</style>
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<body>
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<h1>Bits Cheat Sheet</h1>
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<table>
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<thead>
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<tr>
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<th> </th>
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<th>2<sup>n</sup></th>
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<th>Bits</th>
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<th>Max unsigned int</th>
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<th>Min signed int</th>
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<th>Max signed int</th>
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</tr>
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</thead>
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<tbody>
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<? foreach(range(1, 32) as $b): ?>
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<tr>
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<td>2<sup><?=$b ?></sup></td>
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<td><?=number_format(pow(2, $b)) ?></td>
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<td><?=$b ?></td>
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<td><?=number_format(pow(2, $b) - 1) ?></td>
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<td><? $num = pow(2, $b) / 2 * -1 ?><?=number_format($num) ?></td>
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<td><? $num = pow(2, $b) / 2 - 1 ?><?=number_format($num) ?></td>
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</tr>
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<? endforeach; ?>
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</tbody>
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</table>
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</body>
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</html>
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