Aggiunto Polinomio

polinomio/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml

polinomio/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_19" default="true" project-jdk-name="19" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

polinomio/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/polinomio.iml" filepath="$PROJECT_DIR$/polinomio.iml" />
+    </modules>
+  </component>
+</project>

polinomio/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

polinomio/polinomio.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

polinomio/src/Main.java

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+public class Main {
+    public static void main(String[] args) {
+        double[] first = {1, 1, 1};
+        double[] second = {-7, 0, 2};
+        Polinomio p = new Polinomio(first);
+        Polinomio p2 = new Polinomio(second);
+
+
+        System.out.println(p);
+        System.out.println(p2);
+
+        System.out.println(new Polinomio(p2.add(p)));
+
+        System.out.println(p.y(2));
+    }
+}

polinomio/src/Polinomio.java

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+public class Polinomio {
+    private double[] coefficienti;
+
+    public Polinomio(double[] coefficienti) {
+        this.coefficienti = coefficienti;
+    }
+
+    public double y(double x) {
+        double y = 0;
+        for (int i = coefficienti.length - 1; i >= 0; i--) {
+            y += coefficienti[i] * Math.pow(x, i);
+        }
+
+        return y;
+    }
+
+    public double[] add(Polinomio other) {
+        if(other.coefficienti.length != coefficienti.length) throw new IllegalArgumentException();
+
+        double[] sum = new double[coefficienti.length];
+
+        for (int i = 0; i < coefficienti.length; i++) {
+            sum[i] = coefficienti[i] + other.coefficienti[i];
+        }
+
+        return sum;
+    }
+
+    @Override
+    public String toString() {
+        String testo = "";
+        for (int i = coefficienti.length - 1; i >= 0; i--) {
+            if (coefficienti[i] >= 0) {
+                testo += "+";
+            }
+            testo += coefficienti[i] + "x^" + i + " ";
+        }
+
+        return testo;
+    }
+}