Praktikum 1: add klappt jetzt
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315b44694a
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4da9783e91
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@ -1,12 +1,13 @@
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package de.joethei.hs.java2.praktikum1;
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import java.util.Arrays;
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import java.util.logging.Logger;
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public class GrosseZahl {
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private static Logger logger = Logger.getLogger(GrosseZahl.class.getName());
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private int Zahl[];
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private int ziffern[];
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public GrosseZahl(String d) {
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boolean korrekteEingabe = true;
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@ -16,9 +17,9 @@ public class GrosseZahl {
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}
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}
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if (korrekteEingabe) {
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Zahl = new int[d.length()];
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ziffern = new int[d.length()];
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for (int w = 0; w < d.length(); w++) {
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Zahl[w] = Integer.parseInt(String.valueOf(d.charAt(w)));
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ziffern[w] = Integer.parseInt(String.valueOf(d.charAt(w)));
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}
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} else {
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@ -28,67 +29,75 @@ public class GrosseZahl {
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public GrosseZahl(int i) {
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String intZahl = Integer.toString(i);
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Zahl = new int[intZahl.length()];
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ziffern = new int[intZahl.length()];
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for (int w = 0; w < intZahl.length(); w++) {
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Zahl[w] = Integer.parseInt(String.valueOf(intZahl.charAt(w)));
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ziffern[w] = Integer.parseInt(String.valueOf(intZahl.charAt(w)));
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}
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}
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private GrosseZahl(int[] zahl) {
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this.Zahl = zahl;
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private GrosseZahl(int[] ziffern) {
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this.ziffern = ziffern;
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}
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public String toString() {
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StringBuilder rueckgabe = new StringBuilder();
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for (int aZahl : Zahl) {
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rueckgabe.append(Integer.toString(aZahl));
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for (int ziffer : ziffern) {
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rueckgabe.append(Integer.toString(ziffer));
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}
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return rueckgabe.toString();
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}
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private int toInt() {
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int IntZahl = 0;
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for (int aZahl : Zahl) {
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IntZahl *= 10;
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IntZahl += aZahl;
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}
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return IntZahl;
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}
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public boolean less(GrosseZahl b) {
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if(this.equals(b)) return false;
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if (this.Zahl.length < b.Zahl.length) return true;
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if (this.Zahl.length > b.Zahl.length) return false;
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if (this.ziffern.length < b.ziffern.length) return true;
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if (this.ziffern.length > b.ziffern.length) return false;
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for (int i = this.Zahl.length -1; i >= 0; i--) {
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if (this.Zahl[i] > b.Zahl[i]) return false;
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for (int i = this.ziffern.length -1; i >= 0; i--) {
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if (this.ziffern[i] > b.ziffern[i]) return false;
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}
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return true;
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}
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public GrosseZahl add(GrosseZahl b) {
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int IntZahl = 0;
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for (int aZahl : Zahl) {
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IntZahl *= 10;
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IntZahl += aZahl;
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GrosseZahl big = this.less(b) ? b : this;
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GrosseZahl small = this.less(b) ? this : b;
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int[] array;
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if(big.ziffern.length != small.ziffern.length) {
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int diff = big.ziffern.length - small.ziffern.length;
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array = new int[small.ziffern.length + diff];
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Arrays.fill(array, 0);
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}else array = new int[small.ziffern.length];
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for(int i = small.ziffern.length - 1; i >= 0; i--) {
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array[array.length - i - 1] = small.ziffern[small.ziffern.length - i - 1];
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}
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IntZahl += b.toInt();
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return new GrosseZahl(IntZahl);
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int over = 0;
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for(int i = array.length -1; i >= 0; i--) {
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int tmp = array[i] + big.ziffern[i] + over;
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over = 0;
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if(tmp > 9) {
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over = tmp - 9;
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array[i] = 0;
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}else {
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array[i] = tmp;
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}
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}
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return new GrosseZahl(array);
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}
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public GrosseZahl sub(GrosseZahl b) {
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return null;
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}
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public GrosseZahl mult(GrosseZahl b) {
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int IntZahl = 0;
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for (int aZahl : Zahl) {
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IntZahl *= 10;
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IntZahl += aZahl;
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}
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IntZahl *= b.toInt();
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return new GrosseZahl(IntZahl);
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return null;
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}
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/*
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@ -120,9 +129,9 @@ public class GrosseZahl {
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public boolean equals(Object o) {
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if(o instanceof GrosseZahl) {
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GrosseZahl tmp = (GrosseZahl) o;
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if(tmp.Zahl.length == this.Zahl.length) {
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for(int i = this.Zahl.length - 1; i >= 0; i--) {
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if(tmp.Zahl[i] != this.Zahl[i]) return false;
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if(tmp.ziffern.length == this.ziffern.length) {
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for(int i = this.ziffern.length - 1; i >= 0; i--) {
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if(tmp.ziffern[i] != this.ziffern[i]) return false;
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}
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return true;
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}else return false;
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@ -1,3 +1,5 @@
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package de.joethei.hs.java2.tests;
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import de.joethei.hs.java2.praktikum1.GrosseZahl;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.function.Executable;
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@ -19,8 +21,12 @@ class GrosseZahlTest {
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assertEquals(new GrosseZahl(42), new GrosseZahl("40").add(new GrosseZahl(2)));
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assertEquals(new GrosseZahl("42"), new GrosseZahl(40).add(new GrosseZahl(2)));
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assertNotEquals(new GrosseZahl(43), new GrosseZahl("40").add(new GrosseZahl(2)));
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assertEquals(new GrosseZahl(200), new GrosseZahl(10).add(new GrosseZahl(190)));
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assertEquals(new GrosseZahl(400), new GrosseZahl(50).add(new GrosseZahl(350)));
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assertEquals(new GrosseZahl(4000), new GrosseZahl(500).add(new GrosseZahl(3500)));
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}
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/*
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@Test
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void sub() {
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assertEquals(new GrosseZahl(42), new GrosseZahl(100).sub(new GrosseZahl(58)));
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assertNotEquals(new GrosseZahl("15"), new GrosseZahl("4").mult(new GrosseZahl(3)));
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assertEquals(new GrosseZahl(90000), new GrosseZahl(9).mult(new GrosseZahl(10000)));
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}
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*/
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@Test
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void less() {
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assertFalse(new GrosseZahl("1234").less(new GrosseZahl("1233")));
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}
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/*
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@Test
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void ggT() {
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assertEquals(new GrosseZahl(3), new GrosseZahl(45).ggT(new GrosseZahl(21)));
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assertEquals(new GrosseZahl(70), new GrosseZahl(1400).ggT(new GrosseZahl(210)));
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assertNotEquals(new GrosseZahl(2), new GrosseZahl("7").ggT(new GrosseZahl(13)));
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}
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*/
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}
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