un peu plus d'aide pour Eratosthene

2026-01-26 10:09:53 +01:00
parent 657bfa1cba
commit dae058c2d4
3 changed files with 82 additions and 2 deletions
--- a/R4.01_R4.A.10/td_tp/tp1/src/eratosthene/eratosthene.html
+++ b/R4.01_R4.A.10/td_tp/tp1/src/eratosthene/eratosthene.html
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html lang="en">
+	<head>
+		<meta charset="UTF-8">
+		<title></title>
+		<link rel="stylesheet"
+		href="https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.classless.min.css"
+        >
+  <script src="eratosthene.js"></script>
+	</head>
+	<body>
+		<main>
+
+			<form role="search">
+				<input name="limit" type="text">
+				<input type="submit" value="compute">
+			</form>
+			<article>
+				<p>time : <span id="time1"></span></p>
+				<p>time : <span id="time2"></span></p>
+				<p id="primes"></p>
+			</article>
+		</main>
+		<script>
+			document.querySelector("form").addEventListener("submit",ev => {
+				ev.preventDefault();
+
+				let start,end;
+
+				start = performance.now();
+				primes = eratosthene1(ev.target.limit.value);
+				end = performance.now();
+
+				document.getElementById("time1").textContent = end - start;
+				document.getElementById("primes").textContent = primes;
+
+			})
+		</script>
+	</body>
+</html>
--- a/R4.01_R4.A.10/td_tp/tp1/src/eratosthene/eratosthene.js
+++ b/R4.01_R4.A.10/td_tp/tp1/src/eratosthene/eratosthene.js
@@ -0,0 +1,23 @@
+
+function eratosthene(n)
+{
+	let primes = [];
+	let filterArray = [];
+	for(let i = 2; i <=n; i++){
+		// TODO
+	}
+	return primes;
+}
+
+function eratosthene1(n)
+{
+	let numbers = Array.from({length : n - 2}, (v,k) => k + 2);
+	let p ,primes = [];
+
+	while(numbers.length){
+		[p,...numbers] = numbers;
+		numbers = numbers.filter( x => x%p != 0);
+		primes = [...primes,p];
+	}
+	return primes;
+}