Add stack in C to README.md

README.md

@@ -31,7 +31,7 @@ This repository contains examples of various algorithms written on different pro
 | Data Structure                                                                                  | C                                     | CPP                                   | Java                                  | Python                                |
 |:----------------------------------------------------------------------------------------------- |:-------------------------------------:|:-------------------------------------:|:-------------------------------------:|:-------------------------------------:|
 | [Queue](https://en.wikipedia.org/wiki/Queue_(abstract_data_type))                               |                                       | [:octocat:](queue/Cpp)                |                                       |                                       |
-| [Stack](https://en.wikipedia.org/wiki/Stack_(abstract_data_type))                               |                                       |                                       | [:octocat:](stack/Java)               | [:octocat:](stack/Python)             |
+| [Stack](https://en.wikipedia.org/wiki/Stack_(abstract_data_type))                               | [:octocat:](stack/C)                  |                                       | [:octocat:](stack/Java)               | [:octocat:](stack/Python)             |
 | [Linear Linked List](https://en.wikipedia.org/wiki/Linked_list)                                 | [:octocat:](linked_list/C)            | [:octocat:](linked_list/Cpp)          |                                       | [:octocat:](linked_list/Python)       |
 | [AVL Tree](https://en.wikipedia.org/wiki/AVL_tree)                                              | [:octocat:](avl_tree/C)               |                                       | [:octocat:](avl_tree/Java)            | [:octocat:](avl_tree/Python)          |