From dc16cd2e7aa8cd830478b932f424db4b2a87c3ba Mon Sep 17 00:00:00 2001
From: Giacomo Radaelli <gradaellig@protonmail.com>
Date: Sun, 8 Jan 2023 16:57:54 +0100
Subject: [PATCH] Completato esercizio p6.12 con Sequence

---
 6.x/p6.12/ExpApprossimator.java | 37 +++++++++++++++++++++++++++++++++
 6.x/p6.12/ExpTester.java        | 23 ++++++++++++++++++++
 6.x/p6.12/Sequence.java         |  4 ++++
 3 files changed, 64 insertions(+)
 create mode 100644 6.x/p6.12/ExpApprossimator.java
 create mode 100644 6.x/p6.12/ExpTester.java
 create mode 100644 6.x/p6.12/Sequence.java

diff --git a/6.x/p6.12/ExpApprossimator.java b/6.x/p6.12/ExpApprossimator.java
new file mode 100644
index 0000000..5d943c5
--- /dev/null
+++ b/6.x/p6.12/ExpApprossimator.java
@@ -0,0 +1,37 @@
+/**
+ Metodo che calcola e^x
+ @author radaelli11353
+ */
+public class ExpApprossimator implements Sequence<Double> {
+	private double term;
+	private double x;
+	private int n;
+
+	/**
+	 Costruttore parametrico completo
+	 @param x Valore a cui elevare e
+	*/
+	public ExpApprossimator(double x) {
+		term = 1;
+		this.x = x;
+		n = 1;
+	}
+	
+	/**
+	 Metodo che calcola il valore successivo nella sequenza
+	 @return Addendo successivo nella sequenza
+	*/
+	public Double next() {
+		term = term*x/n;
+		n++;
+		return term;
+	}
+
+	/**
+	 Metodo che verifica se la precisione 1E-9 (arbitraria) è stata raggiunta
+	 @return Vero o falso in base alle approssimazioni eseguite
+	*/
+	public boolean hasNext() {
+		return term > 1E-9;
+	}
+}
\ No newline at end of file
diff --git a/6.x/p6.12/ExpTester.java b/6.x/p6.12/ExpTester.java
new file mode 100644
index 0000000..3921da1
--- /dev/null
+++ b/6.x/p6.12/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();
+
+		ExpApprossimator gen = new ExpApprossimator(x);
+
+		double sum = 1;
+		while(gen.hasNext()) {
+			sum += gen.next();
+		}
+
+		System.out.println(sum);
+	}	
+}
\ No newline at end of file
diff --git a/6.x/p6.12/Sequence.java b/6.x/p6.12/Sequence.java
new file mode 100644
index 0000000..4f11dd1
--- /dev/null
+++ b/6.x/p6.12/Sequence.java
@@ -0,0 +1,4 @@
+public interface Sequence<T> {
+    public boolean hasNext();
+    public T next();
+}
\ No newline at end of file