Add containers module with initial implementation and integrate into CMake build system.

cpp/containers/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 4.1)
+project(containers)
+
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_FLAGS -pedantic-errors)
+
+add_executable(containers main.cpp
+        functions.cpp)

cpp/containers/functions.cpp

@@ -0,0 +1,14 @@
+#include <iostream>
+
+void printArrayAtPosition(int *array, int index) {
+    if (array == nullptr) {
+        return;
+    }
+    if (index < 0) {
+        return;
+    }
+
+    std::cout << "size of array: " << sizeof(array) << std::endl;
+    std::cout << array[index] << std::endl;
+}
+

cpp/containers/functions.h

@@ -0,0 +1,10 @@
+//
+// Created by David Hackbarth on 20.02.26.
+//
+
+#ifndef CONTAINERS_FUNCTIONS_H
+#define CONTAINERS_FUNCTIONS_H
+
+void printArrayAtPosition(int* array, int index);
+
+#endif //CONTAINERS_FUNCTIONS_H

cpp/containers/main.cpp

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+#include <iostream>
+#include <vector>
+#include <list>
+
+#include "functions.h"
+
+typedef std::list<float> FloatList;
+typedef FloatList::iterator FloatListIterator;
+
+int main() {
+    // C array
+    int numbers[5] = {1, 2, 3, 4, 5}; // stack array
+    const int count = 10;
+    // count *= 2;
+    int numbers2[count];
+    numbers2[0] = 10;
+
+    int* numbers3 = new int[count]; // heap array
+    delete[] numbers3;
+    numbers3 = nullptr;
+
+    // numbers[10] = 100;
+
+    std::cout << "size of numbers: " << sizeof(numbers) << std::endl;
+
+    printArrayAtPosition(numbers, 19);
+
+    // vector
+    std::vector<int> v;
+    v.push_back(10);
+    v.push_back(20);
+    v.push_back(30);
+    v.pop_back();
+    v[1] = 100;
+
+    std::cout << "v: " << v.size() << "/" << v.capacity() << std::endl;
+
+    v.push_back(40);
+
+    std::cout << "v: " << v.size() << "/" << v.capacity() << std::endl;
+
+    v.push_back(50);
+
+    std::cout << "v: " << v.size() << "/" << v.capacity() << std::endl;
+
+    v.push_back(60);
+
+    std::cout << "v: " << v.size() << "/" << v.capacity() << std::endl;
+
+    v.reserve(100);
+
+    std::cout << "v: " << v.size() << "/" << v.capacity() << std::endl;
+
+    printArrayAtPosition(v.data(), 1);
+
+    // list
+    std::list<int> l;
+    std::list<int>::iterator it;
+
+    for (it = l.begin(); it != l.end(); ++it) {
+        std::cout << *it << std::endl;
+    }
+
+    return 0;
+}