commit 1

.vscode/tasks.json

@@ -0,0 +1,28 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: g++.exe build active file",
+            "command": "C:\\Program Files\\CodeBlocks\\MinGW\\bin\\g++.exe",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}\\${fileBasenameNoExtension}.exe"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}

Singleton.cpp

@@ -0,0 +1,57 @@
+#include <iostream>
+#include <vector>
+#include <string>
+
+class Logger{
+public:
+     //Retrive the single instance of the object created, and we'll enforce
+     // only one object to be created
+    static Logger& GetInstance(){
+        static Logger* s_instance = new Logger;
+        // static Logger* s_instance;
+        // if (s_instance == nullptr)
+        //     s_instance = new Logger;
+        return *s_instance;
+    }
+
+    void printMessages()
+    {
+        std::cout << "Acessing the logger\n";
+        for(auto& e : m_messages){
+            std::cout << e << " ";
+        }
+    }
+
+    void add_message(std::string s){
+        m_messages.push_back(s);
+    }
+
+private:
+    Logger(){
+        std::cout << "Logger is created.\n"; 
+    }
+
+    ~Logger(){
+        std::cout << "Logger is destructed.\n";
+    }
+
+    std::vector<std::string> m_messages;
+
+};
+
+
+int main(){
+    // Logger logger1;
+    // Logger logger2;
+    // Logger logger3;
+    // Logger logger4;
+    // Logger logger5;
+    // Logger logger6;
+    Logger::GetInstance().printMessages();
+    Logger::GetInstance().add_message("Hello, message 1\n");
+    Logger::GetInstance().add_message("Hello, message 2\n");
+    Logger::GetInstance().add_message("Hello, message 3\n");
+    Logger::GetInstance().add_message("Hello, message 4\n");
+    Logger::GetInstance().printMessages(); 
+    return 0;
+}