task 5

ProjectCatamaran/ProjectCatamaran/CollectionGenericObjects/AbstractCompany.cs

@@ -24,14 +24,14 @@ public abstract class AbstractCompany
         _collection.SetMaxCount = GetMaxCount;
     }
 
-    public static bool operator +(AbstractCompany company, DrawningBoat boat)
+    public static int operator +(AbstractCompany company, DrawningBoat boat)
     {
-        return company._collection?.Insert(boat) ?? false;
+        return company._collection?.Insert(boat) ?? -1;
     }
 
-    public static bool operator -(AbstractCompany company, int position)
+    public static DrawningBoat? operator -(AbstractCompany company, int position)
     {
-        return company._collection?.Remove(position) ?? false;
+        return company._collection?.Remove(position);
     }
 
     public DrawningBoat? GetRandomObject()

ProjectCatamaran/ProjectCatamaran/CollectionGenericObjects/ICollectionGenericObjects.cs

@@ -10,9 +10,9 @@ public interface ICollectionGenericObjects<T> where T : class
 {
     int Count { get; }
     int SetMaxCount { set; }
-    bool Insert(T obj);
-    bool Insert(T obj, int position);
-    bool Remove(int position);
+    int Insert(T obj);
+    int Insert(T obj, int position);
+    T? Remove(int position);
 
     T? Get(int position);
 }

ProjectCatamaran/ProjectCatamaran/CollectionGenericObjects/MassiveGenericObjects.cs

@@ -36,7 +36,7 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T> where T : c
 
         return null;
     }
-    public bool Insert(T obj)
+    public int Insert(T obj)
     {
         //todo
         for (int i = 0; i < Count; i++)
@@ -44,19 +44,19 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T> where T : c
             if (_collection[i] == null)
             {
                 _collection[i] = obj;
-                return true;
+                return i;
             }
         }
 
-        return false;
+        return -1;
     }
 
-    public bool Insert(T obj, int position)
+    public int Insert(T obj, int position)
     {
         //todo
         if (!(position > 0 && position < _collection.Length))
         {
-            return false;
+            return -1;
         }
 
         if (_collection[position] == null)
@@ -68,7 +68,7 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T> where T : c
                 if (_collection[i] == null)
                 {
                     _collection[i] = obj;
-                    return true;
+                    return i;
                 }
             }
 
@@ -77,22 +77,23 @@ public class MassiveGenericObjects<T> : ICollectionGenericObjects<T> where T : c
                 if (_collection[i] == null)
                 {
                     _collection[i] = obj;
-                    return true;
+                    return i;
                 }
             }
         }
-        return false;
+        return -1;
     }
 
-    public bool Remove(int position)
+    public T? Remove(int position)
     {
         if (!(position >= 0 && position < _collection.Length) || _collection[position] == null )
         {
-            return false;
+            return null;
         }
 
+        T? deletedElement = _collection[position];
         _collection[position] = null;
-        return true;
+        return deletedElement;
     }
 }
 

ProjectCatamaran/ProjectCatamaran/FormBoatCollection.cs

@@ -52,7 +52,7 @@ public partial class FormBoatCollection : Form
                 return;
         }
 
-        if (_company + drawningBoat)
+        if (_company + drawningBoat != -1)
         {
             MessageBox.Show(("Объект добавлен"));
             pictureBox.Image = _company.Show();
@@ -100,7 +100,7 @@ public partial class FormBoatCollection : Form
         }
 
         int pos = Convert.ToInt32(maskedTextBoxPosition.Text);
-        if (_company - pos)
+        if (_company - pos != null)
         {
             MessageBox.Show("Объект удален");
             pictureBox.Image = _company.Show();