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Data Structures for C++

About the project

This project intends to provide a simple way of using data structures in C++. There are in-built data structures like stack and queue in C++. There are also other great github repos for this use case, but I wanted to create something simple and unique.

Getting Started

Usage

Compilation is not required to integrate this into another project. Simply copy the folders inside src directory to your project workspace and include the relevant header files in your source file(s).

Instantiation

Data Structures exist as templates, so initialize the instance with required data type.

eg:
SinglyLinkedList <int> sIntObj; //initialize singly linked list of type int
SinglyLinkedList <std::string> sStrObj; //initialize singly linked list of type string
DoublyLinkedList <int> dIntObj; //initialize doubly linked list of type int
DoublyLinkedList <int> dStrObj; //initialize doubly linked list of type string

Insert At Head

InsertAtHead() can be used to insert new data at the head of your data structure.

eg:
sIntObj.InsertAtHead(5);
sStrObj.InsertAtHead("Hello");

Insert At Tail

InsertAtTail() can be used to insert new data at the tail of your data structure.

eg:
sIntObj.InsertAtTail(4);
sStrObj.InsertAtTail("World");

Display the data structure

Display() can be used to display the contents of your data structure.

eg:
std::cout << sIntObj.Display(); << '\n' prints:

5 -> 4

std::cout << sStrObj.Display(); << '\n' prints:

Hello -> World

Note: If data structure is empty, nothing will be printed.

Display the data structure in Reverse (for Doubly Linked List)

DisplayReverse() can be used to display the contents of your doubly linked list from tail to head.

eg:
dIntObj.InsertAtHead(1);
dIntObj.InsertAtTail(2);
dIntObj.InsertAtTail(3);
std::cout << sIntObj.DisplayReverse(); << '\n' prints:

3 <- 2 <- 1

Note: If data structure is empty, nothing will be printed.

Delete Node containing data

Delete() can be used to delete node(s) containing a particular data from your data.

eg:

sIntObj.Delete(5); deletes 5 from your data structure.
sStrObj.Delete("World"); deletes "World" from your data structure.

If there are multiple instances of data, all nodes containing data will be deleted.

Before:

5 -> 1 -> 2 -> 1 -> 4

After sIntObj.Delete(1):

5 -> 2 -> 4

Compilation

This project uses cmake build environment.

Pre-requisites:

  1. cmake
  2. GNU C/C++ compiler

Most linux distributions provide cmake in their own repositories. Package manager of the distro can be used for installation in most cases.

On Ubuntu or Debian based systems:

sudo apt install cmake

On Fedora:

sudo dnf install cmake

On Windows:

  1. Download from website directly. cmake Download
  2. Refer installation instructions. cmake Install

Build Steps:

Below steps are required to be done only for developement purposes or to run executable or unit tests. These steps are not required for integrating to another project. Refer Usage section.

  1. Clone the repository

     git clone https://github.com/balanarayank/simple-cpp-datastructures.git

  2. Go to the project directory

     cd simple-cpp-datastructures

  3. Make a separate build directory for cmake

     mkdir build

  4. Execute cmake

    On Linux:

     cmake ..

    On Windows:

     cmake -G "Unix Makefiles" ..

  5. Build the project

     make

Binary 'src/datastructures-cpp-example' executes an example executable.

Unit Testing:

This project uses googletest for unit testing. Project has been designed to clone and use googletest version 1.11.0 at the time of compilation.

To execute unit test cases after build (step 5 above):

ctest -V

To manually execute the test cases after build (step 5 above):

./test/datastructures-cpp-ut

For more details regarding usage, refer googletest documentation.

TODO

  • ChangeLog
  • Doubly Linked List
  • Binary Search Tree
  • Improve source code comments

Contributing

Contributions are one of the key advantages of the open source community. Any contributions you wish to make are more than welcome.

  1. Fork the Project
  2. Create your Feature Branch (git checkout -b feature/NewFeature)
  3. Commit your Changes (git commit -m 'Add some new feature')
  4. Push to the Branch (git push origin feature/NewFeature)
  5. Open a Pull Request

References

  1. cmake Documentation
  2. googletest Documentation
  3. markdown repo by tchapi for easy README template reference
  4. Best-README-Template repo by othneildrew for easy README template reference
  5. StackOverflow community