Quiz

LoopFun.java

@@ -1,40 +1,75 @@
 public class LoopFun
 {
 
-      /**
-       * Given a number, return the factorial of that number.
-       * For example, given 5, the factorial is 5 x 4 x 3 x 2 x 1 which should return 120.
-       * @param number
-       * @return the factorial of the number
-       */
-      public int factorial(int number){
-          return -1;
-      }
-
-      /**
-       * Given a phrase, get the acronym of that phrase. Acronym is the combination of
-       * the first character of each word in upper case.
-       * For example, given "Ruby on Rails", this method will return "ROR"
-       * @param phrase
-       * @return Upper case string of the first letter of each word
-       */
-      public String acronym(String phrase) {
-          return null;
-      }
-
-      /**
-       * To prevent anyone from reading our messages, we can encrypt it so it will only be readable by its
-       * intended audience. This method encrypt the message by shifting the letter by 3 characters. If the character is
-       * at the end of the alphabet, it will wraps around.
-       * For example:
-       *  'a' => 'd'
-       *  'w' => 'z'
-       *  'x' => 'a'
-       *  'y' => 'b'
-       * @param word
-       * @return the encrypted string by shifting each character by three character
-       */
-      public String encrypt(String word) {
-          return null;
-      }
+    /**
+     * Given a number, return the factorial of that number.
+     * For example, given 5, the factorial is 5 x 4 x 3 x 2 x 1 which should return 120.
+     * @param number
+     * @return the factorial of the number
+     */
+    public int factorial(int number){
+
+        int result = 1;
+        for(int i = 2; i <= number; i++)
+            result *= i;
+        return result;    
+
+    }
+
+    /**
+     * Given a phrase, get the acronym of that phrase. Acronym is the combination of
+     * the first character of each word in upper case.
+     * For example, given "Ruby on Rails", this method will return "ROR"
+     * @param phrase
+     * @return Upper case string of the first letter of each word
+     */
+    public String acronym(String phrase) {
+
+        String acronym = "";
+        acronym += phrase.toUpperCase().charAt(0);
+
+        for (int i = 1; i <= phrase.length() - 1; i++) {
+            if (phrase.charAt(i - 1) == ' ' || phrase.charAt(i - 1) == '-') {
+                acronym += phrase.toUpperCase().charAt(i);
+            }
+        }
+
+        return acronym;
+    }
+    /*
+
+    What can you learn from this solution?
+
+    A huge amount can be learnt from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.
+
+    Here are some questions to help you reflect on this solution and learn the most from it.
+
+    What compromises have been made?
+    Are there new concepts here that I could read more about to develop my understanding?
+     */
+
+    /**
+     * To prevent anyone from reading our messages, we can encrypt it so it will only be readable by its
+     * intended audience. This method encrypt the message by shifting the letter by 3 characters. If the character is
+     * at the end of the alphabet, it will wraps around.
+     * For example:
+     *  'a' => 'd'
+     *  'w' => 'z'
+     *  'x' => 'a'
+     *  'y' => 'b'
+     * @param word
+     * @return the encrypted string by shifting each character by three character
+     */
+    public String encrypt(String word) {
+        char swap =  ' ';
+        char[] arr = word.toCharArray();
+        swap(arr, 0, word.length + 3);
+        int i = arr.length + 3 ;
+        while(i > 1) {
+            swap(arr, i, i-1);
+        }
+        return new swap;
+    }
+
 }
+

MathUtilities.java

@@ -6,7 +6,8 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public int add(int num1, int num2){
-      return -1;
+      int sum = num1 + num2;
+      return sum;
   }
 
   /**
@@ -16,7 +17,8 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public double add(double num1, double num2){
-      return -1;
+       double sum = num1 + num2;
+      return sum;
   }
 
   /**
@@ -25,7 +27,9 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+     double div = number/2;
+    
+      return div;
   }
 
   /**
@@ -34,7 +38,7 @@ public class MathUtilities{
    * @return true if the number is odd, false if it is even
    */
   public boolean isOdd(int number){
-      return false;
+      return true;
   }
 
 
@@ -44,7 +48,8 @@ public class MathUtilities{
    * @return the result of the number multiply by itself
    */
   public int square(int number) {
-      return -1;
+      
+      return number * number;
   }
 
 }

StringUtilities.java

@@ -1,13 +1,23 @@
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
+      
+
+     
+
+        return null;
+   
    }
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+     String newstr = value.substring(0, 1) + value.substring(1 + 1);
+       return newstr;
+         
    }
    
    public String getLastWord(String value) {
-       return null;
-   }
+        
+        return value.substring(value.lastIndexOf(" ")+1);
+       
+    }
+    
 }

package.bluej

@@ -2,25 +2,25 @@
 dependency1.from=StringUtilitiesTest
 dependency1.to=StringUtilities
 dependency1.type=UsesDependency
-dependency2.from=BonusTest
-dependency2.to=Bonus
+dependency2.from=LoopFunTest
+dependency2.to=LoopFun
 dependency2.type=UsesDependency
 dependency3.from=MathUtilitiesTest
 dependency3.to=MathUtilities
 dependency3.type=UsesDependency
-editor.fx.0.height=722
-editor.fx.0.width=876
-editor.fx.0.x=158
-editor.fx.0.y=216
-objectbench.height=164
-objectbench.width=669
-package.divider.horizontal=0.6
-package.divider.vertical=0.7628294036061026
-package.editor.height=543
+editor.fx.0.height=658
+editor.fx.0.width=1280
+editor.fx.0.x=0
+editor.fx.0.y=23
+objectbench.height=148
+objectbench.width=397
+package.divider.horizontal=0.600297176820208
+package.divider.vertical=0.7619047619047619
+package.editor.height=489
 package.editor.width=567
-package.editor.x=557
-package.editor.y=43
-package.frame.height=779
+package.editor.x=-4
+package.editor.y=23
+package.frame.height=709
 package.frame.width=693
 package.numDependencies=3
 package.numTargets=6
@@ -40,20 +40,19 @@ target1.width=110
 target1.x=110
 target1.y=150
 target2.height=50
-target2.name=BonusTest
+target2.name=LoopFunTest
 target2.showInterface=false
 target2.type=UnitTestTargetJunit4
-target2.width=80
-target2.x=120
-target2.y=270
-target3.association=BonusTest
+target2.width=110
+target2.x=10
+target2.y=240
 target3.height=50
-target3.name=Bonus
+target3.name=LoopFun
 target3.showInterface=false
 target3.type=ClassTarget
 target3.width=80
-target3.x=90
-target3.y=300
+target3.x=200
+target3.y=210
 target4.association=MathUtilitiesTest
 target4.height=50
 target4.name=MathUtilities