From f3380f8888ef58425e0596b209528ed55dda3e27 Mon Sep 17 00:00:00 2001
From: Giacomo Radaelli <gradaellig@protonmail.com>
Date: Wed, 11 Jan 2023 17:27:33 +0100
Subject: [PATCH] Aggiunta soluzione prof a ExpGenerator
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Soluzione sbagliata o trascrizione sbagliata? Ultimo numero stampato è
sempre 1.0
---
 6.x/p6.12/Sol Prof/ExpGenerator.java | 29 ++++++++++++++++++++++++++++
 6.x/p6.12/Sol Prof/ExpTester.java    | 23 ++++++++++++++++++++++
 6.x/p6.12/Sol Prof/Sequence.java     |  4 ++++
 3 files changed, 56 insertions(+)
 create mode 100644 6.x/p6.12/Sol Prof/ExpGenerator.java
 create mode 100644 6.x/p6.12/Sol Prof/ExpTester.java
 create mode 100644 6.x/p6.12/Sol Prof/Sequence.java

diff --git a/6.x/p6.12/Sol Prof/ExpGenerator.java b/6.x/p6.12/Sol Prof/ExpGenerator.java
new file mode 100644
index 0000000..19f8f59
--- /dev/null
+++ b/6.x/p6.12/Sol Prof/ExpGenerator.java	
@@ -0,0 +1,29 @@
+public class ExpGenerator implements Sequence<Double>{
+	private double x, nuovo, old, potenza, fattoriale;
+	private int n;
+	public static final double EPSILON = 1E-6;
+
+	public ExpGenerator(double x) {
+		this.x = x;
+		nuovo = 1;
+		old = 0;
+		potenza = 1;
+		fattoriale = 1;
+		n = 0;
+	}
+
+	public boolean hasNext() {
+		return Math.abs(nuovo-old) >= EPSILON;
+	}
+
+	public Double next() {
+		if(!hasNext()) throw new IllegalArgumentException();
+		old = nuovo;
+		n++;
+		potenza *= x;
+		fattoriale *= n;
+		nuovo = old + potenza/fattoriale;
+		return old; 
+	}
+	
+}
\ No newline at end of file
diff --git a/6.x/p6.12/Sol Prof/ExpTester.java b/6.x/p6.12/Sol Prof/ExpTester.java
new file mode 100644
index 0000000..d9ffab4
--- /dev/null
+++ b/6.x/p6.12/Sol Prof/ExpTester.java	
@@ -0,0 +1,23 @@
+import java.util.Scanner;
+
+/**
+ Classe che esegue il test dell'uso della funzione ExpApprossimator
+ @author radaelli11353
+*/
+public class ExpTester {
+	public static void main(String[] args) {
+		Scanner in = new Scanner(System.in);
+
+		System.out.print("Inserisci il valore di x");
+		double x = in.nextDouble();
+
+		ExpGenerator gen = new ExpGenerator(x);
+
+		double sum = 1;
+		while(gen.hasNext()) {
+			System.out.println(gen.next());
+		}
+
+		System.out.println(sum);
+	}	
+}
\ No newline at end of file
diff --git a/6.x/p6.12/Sol Prof/Sequence.java b/6.x/p6.12/Sol Prof/Sequence.java
new file mode 100644
index 0000000..4f11dd1
--- /dev/null
+++ b/6.x/p6.12/Sol Prof/Sequence.java	
@@ -0,0 +1,4 @@
+public interface Sequence<T> {
+    public boolean hasNext();
+    public T next();
+}
\ No newline at end of file