LW6: Abstract Class BaseBookItem with virtual to_string() method.

phoebook/CBookItems.cpp

@@ -322,4 +322,13 @@ std::istream& operator>>(std::istream& s, CBookItems::BookItem& item)
 {
   s >> item._sFirstName >> item._sLastName >> item._sPhoneNumber1 >> item._sPhoneNumber2;
 	return s;
+}
+
+const string CBookItems::BookItem::to_string() const
+{
+  string str = _sFirstName + " " + _sLastName + ": " + _sPhoneNumber1;
+
+  if (_sPhoneNumber2 != "")
+    str += ", " + _sPhoneNumber2;
+  return str;
 }

phoebook/CBookItems.h

@@ -20,30 +20,43 @@ using namespace std;
 class CBookItems
 {
 public:
-	struct BookItem
+  template<class T>
+	class BaseBookItem
 	{
-		private:
-			string _sFirstName;
-			string _sLastName;
-			string _sPhoneNumber1;
-			string _sPhoneNumber2;
+		protected:
+			T _sFirstName;
+			T _sLastName;
+			T _sPhoneNumber1;
+			T _sPhoneNumber2;
 		public:
-			BookItem()
+			BaseBookItem()
 			{
 			}
-			~BookItem()
+			virtual ~BaseBookItem()
 			{
 			}
+			virtual const string to_string() const = 0;
+  };
 
-		//===============================================================================
-		/**
-		*Ïåðåîïðåäåëÿåò îïåðàòîðû âûâîäà/âûâîäà
-		*/
-		friend std::ostream& operator<<(std::ostream& s, const BookItem& item);
-		friend std::istream& operator>>(std::istream& s, BookItem& item);
+  class BookItem : BaseBookItem<string>
+  {
+    public:
+      BookItem()
+      {
+      }
+      virtual ~BookItem()
+      {
+      }
+  		//===============================================================================
+  		/**
+  		*Ïåðåîïðåäåëÿåò îïåðàòîðû âûâîäà/âûâîäà
+  		*/
+  		friend std::ostream& operator<<(std::ostream& s, const BookItem& item);
+  		friend std::istream& operator>>(std::istream& s, BookItem& item);
 
-		friend CBookItems;
-	};
+      friend CBookItems;
+      const string to_string() const;
+  };
 
 	vector<BookItem> _aItems;
 

phoebook/CConsoleUI.cpp

@@ -86,13 +86,7 @@ void CConsoleUI::FindItem(CBookItems& CPhoneBook)
 
 	for (int i = 0; i < nNumOfDesirvedItems.size(); i++)
 	{
-		string sFName = " ";
-		string sLName = " ";
-		string sNum1 = " ";
-		string sNum2 = " ";
-
-		CPhoneBook.GetItem(nNumOfDesirvedItems.at(i), sFName, sLName, sNum1, sNum2);
-		cout << 1 + i << ". " << sFName << " " << sLName << ": " << sNum1 << ", " << sNum2 << endl;
+		cout << 1 + i << ". " << CPhoneBook.GetItem(nNumOfDesirvedItems.at(i)).to_string() << endl;
 	}
 }