Praktikum 1: alles funktionert
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@ -1,2 +1,2 @@
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java2.iml
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Java 2.iml
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target
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@ -1,27 +1,25 @@
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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 Logger logger = Logger.getLogger(this.getClass().getName());
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private int ziffern[];
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private int Zahl[];
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public GrosseZahl(String d) {
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boolean korrekteEingabe = true;
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for (int i = 0; i < d.length(); i++) {
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if (Integer.parseInt(String.valueOf(d.charAt(i))) < 0 || Integer.parseInt(String.valueOf(d.charAt(i))) > 9) {
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Boolean korrekteEingabe=true;
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for(int i=0; i<d.length(); i++) {
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if(d.charAt(i) < '0' || d.charAt(i) > '9') {
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korrekteEingabe = false;
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}
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}
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if (korrekteEingabe) {
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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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ziffern[w] = Integer.parseInt(String.valueOf(d.charAt(w)));
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if(korrekteEingabe) {
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Zahl = 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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}
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} else {
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System.out.println("Incorrect Input!");
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}
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@ -29,131 +27,145 @@ public class GrosseZahl {
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public GrosseZahl(int i) {
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String intZahl = Integer.toString(i);
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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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ziffern[w] = Integer.parseInt(String.valueOf(intZahl.charAt(w)));
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Zahl = 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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}
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}
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private GrosseZahl(int[] ziffern) {
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this.ziffern = ziffern;
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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.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.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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GrosseZahl big = this.less(b) ? b : this;
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GrosseZahl small = this.less(b) ? this : b;
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int[] array = fill(big, small);
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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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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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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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array = fill(big, small);
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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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logger.info(Arrays.toString(array));
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return new GrosseZahl(array);
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}
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private int[] fill(GrosseZahl big, GrosseZahl small) {
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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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return array;
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}
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public GrosseZahl mult(GrosseZahl b) {
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return null;
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}
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/*
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public GrosseZahl ggT(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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if (IntZahl == b.toInt()) {
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return b;
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} else if (this.less(b)) {
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GrosseZahl c = new GrosseZahl(b.toInt() - IntZahl);
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return this.ggT(c);
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} else {
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GrosseZahl c = new GrosseZahl(Math.abs(IntZahl - b.toInt()));
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return c.ggT(b);
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}
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}
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*/
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public GrosseZahl ggT(GrosseZahl b) {
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if(this.equals(b)) return this;
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if(this.less(b)) return this.ggT(b.sub(this));
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else return this.sub(b).ggT(b);
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}
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@Override
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public String toString() {
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StringBuilder result = new StringBuilder();
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for (int ziffer : ziffern) {
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result.append(Integer.toString(ziffer));
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String rueckgabe = "";
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for(int i=0; i<Zahl.length; i++) {
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rueckgabe += Integer.toString(Zahl[i]);
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}
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return result.toString();
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return rueckgabe;
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}
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public boolean less(GrosseZahl b) {
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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.equals(b)) return false;
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for(int i=0; i<this.Zahl.length; i++) {
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if(this.Zahl[i] > b.Zahl[i]) return false;
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if(this.Zahl[i] < b.Zahl[i]) return true;
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}
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return false;
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}
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public GrosseZahl add(GrosseZahl b) {
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int uebertrag = 0;
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GrosseZahl rueckgabe, operand;
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if(this.less(b)) {
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rueckgabe = new GrosseZahl(b.toString());
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operand = new GrosseZahl(this.toString());
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} else {
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rueckgabe = new GrosseZahl(this.toString());
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operand = new GrosseZahl(b.toString());
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}
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for(int i=(rueckgabe.Zahl.length-1), w=(operand.Zahl.length-1); i>=0; i--, w--) {
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rueckgabe.Zahl[i] += uebertrag;
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uebertrag = 0;
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if(w>=0) {
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rueckgabe.Zahl[i] += operand.Zahl[w];
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}
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if(rueckgabe.Zahl[i] > 9) {
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rueckgabe.Zahl[i] -= 10;
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uebertrag = 1;
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}
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if(i==0 && uebertrag==1) {
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GrosseZahl rueckgabe_b = new GrosseZahl("1"+rueckgabe.toString());
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return rueckgabe_b;
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}
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}
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return rueckgabe;
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}
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public GrosseZahl sub(GrosseZahl b) {
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int uebertrag = 0;
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String x;
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if(this.equals(b)) {
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return new GrosseZahl(0);
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} else if(this.less(b)) {
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System.out.println("sub() kann keine negativen Werte zurückgeben.");
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return new GrosseZahl(0);
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}
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GrosseZahl rueckgabe = new GrosseZahl(this.toString());
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GrosseZahl operand = new GrosseZahl(b.toString());
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for(int i=(rueckgabe.Zahl.length-1), w=(operand.Zahl.length-1); i>=0; i--, w--) {
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if(w>=0) {
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rueckgabe.Zahl[i] -= operand.Zahl[w];
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}
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rueckgabe.Zahl[i] -= uebertrag;
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uebertrag = 0;
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if(rueckgabe.Zahl[i] < 0) {
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rueckgabe.Zahl[i] += 10;
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uebertrag += 1;
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}
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}
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while(rueckgabe.Zahl[0] == 0) {
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x="";
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for(int i=1; i<rueckgabe.Zahl.length; i++) {
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x+= rueckgabe.Zahl[i];
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}
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rueckgabe = new GrosseZahl(x);
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}
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return rueckgabe;
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}
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public GrosseZahl mult(GrosseZahl b) {
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GrosseZahl rueckgabe, rueckgabe_b, operand, operand2;
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rueckgabe_b = new GrosseZahl(0);
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if(this.less(b)) {
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operand2 = b;
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operand = this;
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} else {
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operand2 = this;
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operand = b;
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}
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for(int i=0; i<operand.Zahl.length; i++) {
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rueckgabe = new GrosseZahl(0);
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for(int w=0; w<operand.Zahl[i]; w++) {
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rueckgabe = rueckgabe.add(operand2);
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}
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rueckgabe_b = rueckgabe_b.add(rueckgabe);
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if(i != operand.Zahl.length-1) {
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rueckgabe_b = new GrosseZahl(rueckgabe_b.toString()+"0");
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}
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}
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return rueckgabe_b;
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}
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/*
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Boolean equals(GrosseZahl b) {
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if(this.Zahl.length < b.Zahl.length || this.Zahl.length > b.Zahl.length) return false;
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for(int i=0; i<this.Zahl.length; i++) {
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if(this.Zahl[i] != b.Zahl[i]) return false;
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}
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return true;
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}
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*/
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public GrosseZahl ggT(GrosseZahl b) {
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GrosseZahl operand1 = new GrosseZahl(this.toString());
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GrosseZahl operand2 = new GrosseZahl(b.toString());
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if(operand1.equals(operand2)) return operand1;
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else if(operand1.less(operand2)) return operand1.ggT(operand2.sub(operand1));
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else return operand1.sub(operand2).ggT(operand2);
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}
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@Override
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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.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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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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}
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return true;
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}else return false;
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}
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return false;
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}
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}
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@ -10,11 +10,13 @@ class GrosseZahlTest {
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@Test
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void constructors() {
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/*
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Executable exec = () -> new GrosseZahl("Hallo Welt");
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assertThrows(NumberFormatException.class, exec);
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*/
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assertEquals(new GrosseZahl("1456"), new GrosseZahl(1456));
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assertNotEquals(new GrosseZahl("1234"), new GrosseZahl(1233));
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assertNotEquals(new GrosseZahl(14), 15);
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assertNotEquals(new GrosseZahl(14), 14);
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}
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@Test
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@ -22,25 +24,26 @@ 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(190).add(new GrosseZahl("10")));
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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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assertEquals(new GrosseZahl(200), new GrosseZahl("198").add(new GrosseZahl(2)));
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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(43), new GrosseZahl(100).sub(new GrosseZahl(58)));
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assertEquals(new GrosseZahl(100), new GrosseZahl(150).sub(new GrosseZahl(50)));
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}
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/*
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@Test
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void mult() {
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assertEquals(new GrosseZahl(15), new GrosseZahl("5").mult(new GrosseZahl(3)));
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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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@ -57,13 +60,11 @@ class GrosseZahlTest {
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assertEquals("45", new GrosseZahl("45").toString());
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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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