fertige Rainer Loesung

todten/GSDSolution.java

@@ -1,21 +1,104 @@
-/*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
- */
-package gsdsolution;
-
 /**
  *
  * @author todten
  */
+import java.math.*;
+import java.util.*;
+
 public class GSDSolution {
 
-    /**
-     * @param args the command line arguments
-     */
+    /* Main Program */
     public static void main(String[] args) {
-        System.out.println("Hello GSD \n");
+        
+        int someCows = 10;
+
+        System.out.println(someCows + " cows have " + countLegs(someCows) + " legs \n");
+
+        System.out.println("Calculate Row Vector");
+        calcAbsRowVector(inputMatrix);
+        
+        System.out.println("Merge and Sort Arrays");
+        mergeAndSortArrays(input1, input2);
+
+    }
+
+       
+    /* Third Exercise */
+    
+    public static int countLegs(int cows) {
+        if (cows == 0) {
+            return 0;
+        } else {
+            return 4 + countLegs(cows - 1);
+        }
+    }
+
+    /* First Exercise */
+    
+    static int[][] inputMatrix = new int[][]{
+        {2, 2},
+        {4, 4},
+        {6, 5}};
+
+    public static double[] calcAbsRowVector(int[][] aMatrix) {
+
+        double[] result = new double[aMatrix.length];
+        double temp = 0.0;
+
+        for (int i = 0; i < aMatrix.length; i++) {
+            for (int j = 0; j < aMatrix[i].length; j++) {
+                temp = temp + Math.pow(aMatrix[i][j], 2);
+                //System.out.println(" I = " + i + " J = " + j + " Temp = " + temp);
+            }
+            result[i] = Math.sqrt(temp);
+            temp = 0.0;
+            //System.out.println(" Result at I " + i + " Result " + result[i]);
+        }
+
+        return result;
     }
+
+    /* Second Exercise */
     
+    static int[] input1 = new int[]{2, 7, 5, 34};
+    static int[] input2 = new int[]{3, 48, 4, 72};
+    
+    public static int[] mergeAndSortArrays(int[] firstArray, int[] secondArray) {
+
+        int[] resultArray = new int[firstArray.length * 2];
+        /* OK, both Arrays are the same size */
+
+        int offset = firstArray.length;
+
+        for (int i = 0; i < firstArray.length; i++) {
+            resultArray[i] = firstArray[i];
+        }
+        for (int i = 0; i < secondArray.length; i++) {
+            resultArray[i + offset] = secondArray[i];
+        }
+        
+        
+        
+        
+        /* Just for debugging */
+        System.out.println("Result Array " + Arrays.toString(resultArray));
+        
+        /*
+         * Die haeufigste Antwort wird die Verwendung der build - in Funktion 
+         * von Java zum Sortieren von Arrays sein
+        */
+        
+        Arrays.sort(resultArray);
+        
+         /*
+         * Dann nachfragen und den Bewerber das Array manuell mit einem 
+         * Algorithmus seiner Wahl (z.B. Quicksort oder einfache Maximumssuche)
+         * sortieren lassen
+        */
+        
+        /* Just for debugging */
+        System.out.println("Sorted Result Array " + Arrays.toString(resultArray));
+        
+        return resultArray;
+    }
 }