This repository contains some of the data structures implementation using OOP in C++. Examples are Stack, Queue, Linked List, Tree, and Graph This project is part of learning stage in College and also to dive in into data structure. Each program contains 3 file: first the vscode configuration; second is the .h file where the implementation of data structure is defined; and lastly the main.cpp which going to test the structure. The main function is a simple main menu program where user can choose different functionalities of the data structure.