Finished task

Boolean.CSharp.Main/Core.cs

@@ -3,6 +3,7 @@
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using System.Xml.Schema;
 using Boolean.CSharp.Main.Misc;
 
 namespace Boolean.CSharp.Main
@@ -15,22 +16,22 @@ public Car Question1()
             /*
                 Examine the code in the Car class.  There are 2 constructor methods, identified because they
                 have the same name as the class which in this case is Car..
-
+            
 
 
                 public Car()
                 {
-                    _model = string.Empty;
+                    _model = Model;
                     _make = string.Empty;       
                 }
-                public Car(string Make)
+                public Car(string _make, string _model)
                 {
                     _make = Make;
-                    _model = string.Empty;
+                    _model = Model;
                 }
             */
 
-            Car car = new Car("Volkswagen");
+            Car car = new Car("Volkswagen", "Beetle");
             /*  When the car in instantiated, the constructor is passed a string
              in this case Volkswagen which is a Make of car is passed in.
              Within the constructor the 'string Make' variable has scope within the constructor and assiged to the _make member now visible to the whole class
@@ -75,7 +76,7 @@ Having to 2 constructors is an example of Overloading.
 
              */
             //TODO 2. Ensure both constructors on the Motorbike class set the cc of the Motorcycle to 373.
-            Motorbike myMotorbike = new Motorbike("KTM", "Duke");
+            Motorbike myMotorbike = new Motorbike("KTM", "Duke", 373);
 
             if(myMotorbike.CC > 0)
             {
@@ -92,7 +93,9 @@ public Bicycle Question3()
             //See there is somewhere to store the number of wheels the bike has 
             //but no constructor to set this
             //TODO: 3. Add a constructor to the Bicycle class that populates the _wheelCount variable
-            Bicycle bike = new Bicycle();
+            Bicycle bike = new Bicycle(200);
+
+
 
             return bike;
 
@@ -108,7 +111,7 @@ public Unicycle Question4()
 
             //TIP  see we already have an internal member for the unicyclist name:  _nameOfUnicyclist so you can use this to store the name internally
             //      it is good practice to name internal class variable with an _ at the beginning
-            Unicycle unicycle = new Unicycle();
+            Unicycle unicycle = new Unicycle("Aleksander");
 
 
 
@@ -132,9 +135,10 @@ What are the parameters and types?
              */
             Aeroplane plane = new Aeroplane();            
             plane.FlightDetails("LHR", "JFK");
-            
+
             //TODO:  5.  Call the FlightDetails method that sets the cancelled message and  cancel the flight
-
+
+            plane.FlightDetails("LHR");
            //write code here 
 
             return plane;

Boolean.CSharp.Main/Extension.cs

@@ -2,7 +2,10 @@
 
 
 
+using System.ComponentModel;
+using System.Numerics;
 using System.Reflection.Metadata.Ecma335;
+using System.Text;
 
 namespace Boolean.CSharp.Main
 {
@@ -12,18 +15,56 @@ public class Extension
         //Implement the following methods:
 
         //TODO: 1. add, which accepts two floats and returns a float (both floats added together)
+        public float Add(float x, float y)
+        {
+            return x + y;
+        }
 
         //TODO: 2. add, which accepts two doubles and returns a double (both doubles added together)
+        public double add(double x, double y)
+        {
+            return x + y;
+        }
 
         //TODO: 3. subtract, which accepts two floats and returns a float (first float minus second float)      
-
+        public float subtract(float x, float y)
+        {
+            return x - y;
+        }
         //TODO: 4. subtract, which accepts a String and a char and returns a string with all instances of the provided char removed        
-
+        public string subtract(string str, char c)
+        {
+            StringBuilder sb = new StringBuilder();
+            foreach(char ch in str)
+            {
+                if (ch != c)
+                {
+                    sb.Append(ch);
+                }
+            }
+            return sb.ToString();
+        }
         //TODO: 5. multiply, which accepts two ints and returns an int (first int multiplied by second int)
+        public int multiply(int x, int y) { return  x * y; }
 
         //TODO: 6. multiply, which accepts a string and an int, and returns a string containing the provided string as many times as the provided int separated by a comma. E.g. multiply("Hello", 3) -> "Hello,Hello,Hello"
-
+      public string multiply(string str, int frequency)
+        {
+            return string.Join(",", Enumerable.Repeat(str, frequency));
+        }
+
         //TODO: 7. multiply, which accepts an array of Strings that each contain a number, and an int. The method should return an array of ints that contain the value of multiplying each String number by the provided int E.g. multiply(["2", "7", "3"], 3) -> [6, 21, 9]
+        public int[] multiply(string[] array, int num)
+        {
+            var numArray = new int[num];
+            for (int i = 0; i < numArray.Length; i++)
+            {
+                int current;
+                int.TryParse(array[i], out current);
+                numArray[i] = current * num;
+            }
 
+            return numArray;
+        }
     }
 }

Boolean.CSharp.Main/Misc/Bicycle.cs

@@ -10,6 +10,11 @@ public class Bicycle
     {
         private int _wheelCount;
 
-        public int WheelCount { get; set; }
+        public Bicycle(int wheelCount)
+        {
+            _wheelCount = wheelCount;
+        }
+
+        public int WheelCount { get { return _wheelCount; } set { _wheelCount = value; } }
     }
 }

Boolean.CSharp.Main/Misc/Car.cs

@@ -14,13 +14,13 @@ public class Car
 
         public Car()
         {
-            _model = string.Empty;
-            _make = string.Empty;
+            _model = Model;
+            _make = Make;
         }
-        public Car(string Make)
+        public Car(string Make, string Model)
         {
             _make = Make;
-            _model = string.Empty;
+            _model = Model;
         }
 
         public string Make { get => _make; set => _make = value; }

Boolean.CSharp.Main/Misc/Motorbike.cs

@@ -20,15 +20,15 @@ public Motorbike()
             _make = string.Empty;
             _model = string.Empty;
         }
-        public Motorbike(string Make, string Model)
-        {            
+        public Motorbike(string Make, string Model, int CC)
+        {
             _make = Make;
-            _model = Model;         
-
+            _model = Model;
+            _cc = CC;
         }
-        public string Make { get; }
-        public string Model { get; }
-        public int CC { get; }
-
+        public string Make { get { return _make; } set { _make = value; } }
+        public string Model { get { return _model; } set { _model = value; } }
+        public int CC { get { return _cc; } set { _cc = value; } }
+       
     }
 }

Boolean.CSharp.Main/Misc/Unicycle.cs

@@ -10,6 +10,11 @@ public class Unicycle
     {
         private string _nameOfUnicyclist;
 
+        public Unicycle(string Unicyclist)
+        {
+            _nameOfUnicyclist = Unicyclist;
+        }
+
         public string NameOfUnicyclist { get => _nameOfUnicyclist; set => _nameOfUnicyclist = value; }
         public int WheelCount { get; set; } = 1;
     }

Boolean.CSharp.Test/ExtensionTests.cs

@@ -22,7 +22,7 @@ public void TestQuestion1()
 
             Extension extension = new Extension();
 
-            float result = extension.add(a, b);
+            float result = (float)extension.add(a, b);
 
             Assert.AreEqual(3.0f, result);
 
@@ -83,7 +83,7 @@ public void TestQuestion5()
         public void TestQuestion6()
         {
             string source = "Hello";
-            int dupes = 3;
+
 
             Extension extension = new Extension();