Dev_2025_11_08

.gitignore

@@ -1,2 +1,3 @@
 *build
-*private*
+*private*
+*.vscode

CMakeLists.txt

@@ -5,10 +5,20 @@ cmake_minimum_required(VERSION 3.14)
 # ----------------------------------------------------------------------------------------
 project(cpp_lab_project # ${PROJECT_NAME}
     VERSION 1.0.0
-    DESCRIPTION "The project with GoogleTest and CMake"
+    DESCRIPTION "A C/C++ project uses CMake, GoogleTest, gcc, g++, cppcheck, and lcov, integrated with Docker and GitHub Actions for CI/CD."
     LANGUAGES CXX
 )
 
+# Build timestamp
+file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/include)
+string(TIMESTAMP BUILD_TIME "%Y-%m-%d %H:%M:%S")
+
+configure_file(
+    ${CMAKE_SOURCE_DIR}/include/version.h.in
+    ${CMAKE_BINARY_DIR}/generated/version.h
+)
+
+
 set(PROJECT_NAME_TEST ${PROJECT_NAME}_unit_test) # name for the unit-test executable
 
 # ----------------------------------------------------------------------------------------
@@ -60,11 +70,14 @@ enable_testing()
 # Header files directory
 set(APP_HEADERS 
     "include"
+    "${CMAKE_BINARY_DIR}/generated"   # cmake generated headers
 )
 
 # Core source files
 set(APP_SOURCES
     "src/DeleteMe.cpp"
+    "src/core/basics/InitializeVariable.cpp"
+    "src/core/basics/Operations.cpp"
 )
 
 # Test files

README.md

@@ -1,54 +1,67 @@
-## OVERVIEW
- - Structure:
-       includes/   → header files (.h, .hpp)
-       src/        → source files (.cpp)
-       tests/      → GoogleTest test cases
+## 1. OVERVIEW
+**Project Structure**
+```
+includes/   → Header files (.h, .hpp)  
+src/        → Source files (.cpp)  
+tests/      → GoogleTest test cases  
+```
+## 2. DEPENDENCIES
+Make sure the following tools are installed before building the project:
+- **g++ / gcc**
+- **CMake**
+- **Git**
+- **lcov** (for code coverage)
+- **cppcheck** (for static analysis)
 
-## DEPENDENCIES
-
-## SETUP
+## 3. SETUP
 * Setup the Local Test Environment
-    * Using your own Ubuntu system
+    * 1.Using your own Ubuntu system
         * Install `gcc`, `cmake`, `git`, and `pthread` (Skip this step if you already install)
             ```
             $ sudo apt-get update
-            $ sudo apt-get install g++=4:5.3.1-1ubuntu1
-            $ sudo apt-get install lcov=1.12-2
-            $ sudo apt-get install cmake=3.5.1-1ubuntu3
-            $ sudo apt-get install git=1:2.7.4-0ubuntu1.6
-            $ sudo apt-get install libpthread-stubs0-dev=0.3-4
-
+            $ sudo apt-get install g++
+            $ sudo apt-get install lcov
+            $ sudo apt-get install cmake
+            $ sudo apt-get install git
+            $ sudo apt-get install cppcheck
             ```
         * Build the application and the tests
             ```
             $ cd build
             $ cmake ..
             $ cmake --build .
-
             ```
         * Run the application and the test
             ```
             $ ./cpp_lab_project
             $ ./cpp_lab_project_test
             ```
-        * (Optional) Run the cpp check
+        * (Optional) Run static analysis
             ```
             $ sudo apt-get install cppcheck
             $ cppcheck "folder" / "file"
             ```
-    * Using **Docker**
-        * Use the -t or --tag flag to set the name of the image to be created. (the full name is actually sample-ci-cpp:latest, since latest is the default tag)
-        * Opening an interactive shell inside your Docker container to explore, test, or debug the environment built from your image.
-            * docker run → start a new container.
-            * -it → run it interactively:
-            * -i = keep STDIN open (so you can type commands)
-            * -t = allocate a terminal (TTY)
-            * sample-ci-cpp:latest → the image you built earlier.
-            * /bin/bash → the command to execute inside the container (opens a Bash shell).
+    * 2.Using **Docker**
+        * Build the Docker image
             ```
             docker build --tag sample-ci-cpp .
+            ```
+        * Run an interactive container
+            ```
             docker run -it sample-ci-cpp:latest /bin/bash
+            ```
+        * Inspect the environment
+            ```
             printenv
             ```
+        * *Notes:*
+            * Use the -t or --tag flag to set the name of the image to be created. (the full name is actually sample-ci-cpp:latest, since latest is the default tag)
+            * Opening an interactive shell inside your Docker container to explore, test, or debug the environment built from your image.
+            * docker run to start a new container.
+            * -it → run it interactively:
+            * -i = keep STDIN open (so you can type commands)
+            * -t = allocate a terminal (TTY)
+            * sample-ci-cpp:latest → the image you built earlier.
+            * /bin/bash → the command to execute inside the container (opens a Bash shell).
 
-## DOCUMENTATIONs
+## 4. DOCUMENTATIONS

include/version.h.in

@@ -0,0 +1,6 @@
+#pragma once
+
+#define APP_NAME        "@PROJECT_NAME@"
+#define APP_VERSION     "@PROJECT_VERSION@"
+#define APP_DESCRIPTION "@PROJECT_DESCRIPTION@"
+#define APP_BUILD_TIME  "@BUILD_TIME@"

src/core/basics/InitializeVariable.cpp

@@ -0,0 +1,65 @@
+#include <iostream>
+using namespace std;
+
+void initialize_variable();
+
+// A struct that runs code when its object is created
+struct InitializeVariable
+{
+    InitializeVariable()
+    {
+        cout << "\n"
+             << "\n"
+             << "InitializeVariable\n";
+        initialize_variable();
+    }
+};
+
+// All global and static objects are constructed before main() begins.
+static InitializeVariable autoRunInstance;
+
+struct Foo
+{
+    Foo()
+    {
+        cout << "Default constructor/ default init\n";
+    }
+
+    // explicit Foo(int)
+    explicit Foo(int)
+    {
+        cout << "Constructor called with int / copy init\n";
+    }
+
+    Foo(const Foo &other)
+    {
+        std::cout << "Copy constructor called\n";
+    }
+};
+
+void initialize_variable()
+{
+    cout << "\n--- Variable Initialization Examples ---\n";
+    // There are there common ways to intialize a variable
+    // * Default
+    [[maybe_unused]] int initDefaultVar;
+    [[maybe_unused]] Foo initDefaultObj;
+
+    // * Traditional initialization
+    //   * Copy-init: Type var = value;
+    //     1. Compiler tries to convert the value to a temporary Foo.
+    //     2. If the constructor is explicit, implicit conversion is blocked -> compilation error.
+    //     3. Otherwise, a temporary Foo is created and then copied/moved into the variable.
+    [[maybe_unused]] Foo copyInitObj = (Foo)2.3; // explicit cast: double 2.3 -> int 2 (implicit narrowing) -> Foo(int) -> temporary Foo -> copied/moved into copyInitObj
+    // Foo copyInitObjError = 2.3; // ERROR: implicit conversion blocked by explicit constructor
+    // We can explicitly prevent certain conversions using = delete or using {}
+
+    //      * direct-init: Type var(value);
+    [[maybe_unused]] Foo directInitObj(4);    // call Foo(int)
+    [[maybe_unused]] Foo directInitObj2(4.3); // look for constructor -> implicit 4.3(float) -> 4(int) -> call Foo(int) ->
+
+    //      * Brace init
+    // calls the constructor directly without allowing implicit conversions.
+    [[maybe_unused]] Foo braceInit{3};
+    // Foo braceInit2{3.3}; // ERORR => Prefer this way
+}

src/core/basics/Operations.cpp

@@ -0,0 +1,129 @@
+#include <iostream>
+using namespace std;
+
+void arithmeticOperator();
+void logicalOperator();
+void bitWiseOperator();
+
+struct Operations
+{
+    Operations()
+    {
+        cout << "\n"
+             << "\n"
+             << "Operation\n";
+        arithmeticOperator();
+        logicalOperator();
+        bitWiseOperator();
+    }
+};
+
+static Operations autoRunInstance;
+
+void arithmeticOperator()
+{
+    cout << "\n--- ArithmeticOperator Examples ---\n";
+    int a{100}, b{200};
+
+    // Addition
+    cout << "a = " << a << ", b = " << b << "\n";
+    int sum = a + b;
+    cout << "sum = " << sum << "\n";
+
+    // Subtraction
+    cout << "a = " << a << ", b = " << b << "\n";
+    int different = a - b;
+    cout << "different = " << different << "\n";
+
+    // Multiplication
+    cout << "a = " << a << ", b = " << b << "\n";
+    int product = a * b;
+    cout << "product = " << product << "\n";
+
+    // Division
+    cout << "a = " << a << ", b = " << b << "\n";
+    int quotient = a / b;
+    cout << "quotient = " << quotient << "\n";
+
+    // Modulus
+    cout << "a = " << a << ", b = " << b << "\n";
+    int remainder = a % b;
+    cout << "remainder = " << remainder << "\n";
+
+    // Increment
+    cout << "a = " << a << "\n";
+    int preIn = ++a; // increase a, return copy
+    cout << "preIn = " << preIn << "\n";
+
+    cout << "a = " << a << "\n";
+    int postIn = a++; // copy a to a copy, then increase a, return copy
+    cout << "postIn = " << postIn << "\n";
+
+    // Decrement
+    cout << "b = " << b << "\n";
+    int preDe = --b;
+    cout << "preDe = " << preDe << "\n";
+
+    cout << "b = " << b << "\n";
+    int postDe = b--;
+    cout << "postDe = " << postDe << "\n";
+
+    // Comma:
+    int value = (a++, b); // a is incremented, then b is returned
+    cout << "a = " << a << ", b = " << b << "\n";
+    cout << "comma(a++, b) = " << value << "\n";
+}
+
+void logicalOperator()
+{
+    cout << "\n--- LogicalOperator Examples ---\n";
+    bool a = true;
+    bool b = false;
+    bool c = true;
+
+    cout << boolalpha; // show true/false instead of 1/0
+    cout << "a = " << a << ", b = " << b << ", c = " << c << "\n\n";
+
+    // AND (&&)
+    cout << "[AND] a && b = " << (a && b) << "\n";
+
+    // OR (||)
+    cout << "[OR ] a || b = " << (a || b) << "\n";
+
+    // NOT (!)
+    cout << "[NOT] !c = " << (!c) << "\n";
+}
+
+#include <bitset>
+void bitWiseOperator()
+{
+    cout << "\n--- BitWiseOperator Examples ---\n";
+    bitset<8> bitsA{0b1111'1111};
+    bitset<8> bitsB{0b1111'0000};
+
+    cout << "bitA = " << bitsA << ", bitB = " << bitsB << "\n";
+
+    // AND
+    bitset<8> result = bitsA & bitsB;
+    cout << "bitA && bitB= " << result << "\n";
+
+    // OR
+    result = bitsA | bitsB;
+    cout << "bitA | bitB= " << result << "\n";
+
+    // XOR
+    result = bitsA ^ bitsB;
+    cout << "bitA ^ bitB= " << result << "\n";
+
+    // NOT
+    result = ~bitsA;
+    cout << "~bitA = " << result << "\n";
+
+    // LEFT SHIFT
+    result = bitsA << 1;
+    cout << "bitA << 1 = " << result << "\n";
+
+    // RIGHT SHIFT
+    result = bitsA >> 1;
+    cout << "bitA >> 1 = " << result << "\n";
+}

src/main.cpp

@@ -1,7 +1,9 @@
 #include <iostream>
+#include "version.h"
 
 int main(int argc, char *argv[])
 {
-    std::cout << "Hello World" << std::endl;
+    std::cout << APP_NAME << " v" << APP_VERSION << std::endl;
+    std::cout << APP_DESCRIPTION << std::endl;
     return 0;
 }