From 1807704940e1d365b7aaf6bb5c9e76fc64a0a9c6 Mon Sep 17 00:00:00 2001
From: Alexander Zhirov <alexander@zhirov.website>
Date: Thu, 4 Nov 2021 01:35:16 +0300
Subject: [PATCH] lesson_4

---
 README.md              |  1 +
 lesson_5/Singleton.cpp | 32 ++++++++++++++++++++++++++++++++
 lesson_5/Singleton.hpp | 22 ++++++++++++++++++++++
 lesson_5/main.cpp      | 16 ++++++++++++++++
 4 files changed, 71 insertions(+)
 create mode 100644 lesson_5/Singleton.cpp
 create mode 100644 lesson_5/Singleton.hpp
 create mode 100644 lesson_5/main.cpp

diff --git a/README.md b/README.md
index e69de29..26a2706 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1 @@
+Паттерн "Одиночка" гарантирует, что класс имеет только один экземпляр, и предоставляет глобальную точку доступа к этому экземпляру.
\ No newline at end of file
diff --git a/lesson_5/Singleton.cpp b/lesson_5/Singleton.cpp
new file mode 100644
index 0000000..d64ea3d
--- /dev/null
+++ b/lesson_5/Singleton.cpp
@@ -0,0 +1,32 @@
+/*
+ * Singleton.cpp
+ *
+ *  Created on: 4 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#include "Singleton.hpp"
+
+Singleton *Singleton::_instance = nullptr;
+
+Singleton::Singleton() {}
+
+Singleton* Singleton::Instance()
+{
+    if (_instance)
+    {
+        _instance = new Singleton;
+    }
+
+    return _instance;
+}
+
+std::string Singleton::getDiscription()
+{
+    return "I'm a statically initialized Singleton!";
+}
+
+Singleton::~Singleton()
+{
+    delete _instance;
+}
diff --git a/lesson_5/Singleton.hpp b/lesson_5/Singleton.hpp
new file mode 100644
index 0000000..3479a97
--- /dev/null
+++ b/lesson_5/Singleton.hpp
@@ -0,0 +1,22 @@
+/*
+ * Singleton.hpp
+ *
+ *  Created on: 4 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#pragma once
+
+#include <string>
+
+class Singleton
+{
+private:
+    static Singleton *_instance;
+protected:
+    Singleton();
+    ~Singleton();
+public:
+    static Singleton* Instance();
+    std::string getDiscription();
+};
diff --git a/lesson_5/main.cpp b/lesson_5/main.cpp
new file mode 100644
index 0000000..b0ffdb0
--- /dev/null
+++ b/lesson_5/main.cpp
@@ -0,0 +1,16 @@
+/*
+ * main.cpp
+ *
+ *  Created on: 4 нояб. 2021 г.
+ *      Author: alexander
+ */
+
+#include "Singleton.hpp"
+#include <iostream>
+
+int main()
+{
+    std::cout << Singleton::Instance()->getDiscription() << std::endl;
+
+    return 0;
+}