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+<?php
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+/* screen-calculator.php – korrigierte ASCII‑Art */
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+?>
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+<!DOCTYPE html>
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+<html lang="de">
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+<head>
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+ <meta charset="UTF-8">
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+ <title>Bildschirm‑Rechner</title>
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+ <style>
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+ body {font-family:Arial, sans-serif; margin:24px; color:#111; background:#fafafa;}
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+ .card {max-width:760px; margin:auto; padding:18px; border:1px solid #ddd;
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+ border-radius:8px; box-shadow:0 2px 6px rgba(0,0,0,0.03); background:#fff;}
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+ h1 {font-size:20px; margin-bottom:8px;}
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+ .control {margin:14px 0;}
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+ label {display:block; font-size:13px; margin-bottom:6px; color:#333;}
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+ select, input[type="range"] {width:100%;}
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+ .muted {color:#666; font-size:13px;}
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+ .value {font-weight:700; margin-left:6px;}
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+ .results {margin-top:18px; display:grid; grid-template-columns:1fr 1fr; gap:12px;}
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+ .result {padding:12px; border-radius:6px; background:#f9f9f9; border:1px solid #eee;}
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+ .footer {margin-top:14px; font-size:13px; color:#444;}
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+ @media (max-width:600px){ .results{grid-template-columns:1fr;} }
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+ #ascii {font-family:"Courier New",Courier,monospace; white-space:pre; line-height:1;}
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+ </style>
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+</head>
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+<body>
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+
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+<div class="card">
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+ <h1>Bildschirm‑Rechner</h1>
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+
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+ <div class="control">
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+ <label for="ratio">Seitenverhältnis</label>
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+ <select id="ratio">
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+ <option value="1/1">1:1</option>
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+ <option value="3/2">3:2</option>
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+ <option value="3/4">3:4</option>
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+ <option value="4/3">4:3</option>
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+ <option value="5/4">5:4</option>
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+ <option value="15/9">15:9</option>
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+ <option value="16/10">16:10</option>
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+ <option value="16/9" selected>16:9</option>
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+ <option value="17/9">17:9</option>
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+ <option value="21/9">21:9</option>
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+ <option value="24/10">24:10</option>
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+ <option value="32/9">32:9</option>
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+ </select>
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+ </div>
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+
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+ <div class="control">
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+ <label for="diag">Diagonale (Zoll)</label>
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+ <input type="range" id="diag" min="4" max="100" step="1" value="16">
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+ <div class="muted">Auswahl: <span id="diagVal" class="value">16 ″ / 40.64 cm</span></div>
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+ </div>
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+
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+ <div class="results">
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+ <div class="result"><pre id="ascii"></pre></div>
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+ <div class="result">
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+ <div>Höhe: <span id="height" class="value"></span> cm / <span id="heightIn" class="value"></span> ″</div>
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+ <div>Breite: <span id="width" class="value"></span> cm / <span id="widthIn" class="value"></span> ″</div>
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+ </div>
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+ </div>
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+
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+ <div class="footer">
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+ Hinweis: Die Werte basieren ausschließlich auf den eingegebenen Parametern.
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+ Tatsächliche Bildschirme können abweichen.
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+ </div>
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+</div>
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+
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+<script>
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+const ratioSelect = document.getElementById('ratio');
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+const diagSlider = document.getElementById('diag');
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+const diagValSpan = document.getElementById('diagVal');
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+const asciiBox = document.getElementById('ascii');
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+const heightSpan = document.getElementById('height');
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+const heightInSpan = document.getElementById('heightIn');
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+const widthSpan = document.getElementById('width');
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+const widthInSpan = document.getElementById('widthIn');
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+
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+function calc() {
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+ const [a, b] = ratioSelect.value.split('/').map(Number);
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+ const ratioText = `${a}:${b}`;
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+ const dIn = parseInt(diagSlider.value, 10); // ganzzahliges Zoll
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+ const dCm = dIn * 2.54;
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+
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+ const factor = Math.sqrt(a*a + b*b);
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+ const widthCm = dCm * a / factor;
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+ const heightCm = dCm * b / factor;
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+ const widthIn = widthCm / 2.54;
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+ const heightIn = heightCm / 2.54;
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+
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+ diagValSpan.textContent = `${dIn} ″ / ${dCm.toFixed(2)} cm`;
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+ heightSpan.textContent = heightCm.toFixed(2);
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+ heightInSpan.textContent = heightIn.toFixed(2);
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+ widthSpan.textContent = widthCm.toFixed(2);
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+ widthInSpan.textContent = widthIn.toFixed(2);
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+
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+// ASCII‑Art (10 Zeilen, Breite proportional)
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+ const rows = 10;
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+ const cols = Math.max(4, Math.round((widthCm/heightCm) * rows));
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+ let art = '';
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+ for (let r = 0; r < rows; r++) {
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+ for (let c = 0; c < cols; c++) {
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+ art += (r===0 || r===rows-1 || c===0 || c===cols-1) ? '#' : ' ';
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+ }
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+ art += '\n';
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+ }
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+ asciiBox.textContent = art;
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+}
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+
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+// initial
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+calc();
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+ratioSelect.addEventListener('change', calc);
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+diagSlider.addEventListener('input', calc);
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+</script>
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+
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+</body>
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+</html>
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