fix: broken C++ links (#170)

* fixed broken cpp links

* fix: broken cpp links

Author: shrutikahilale

Diff for: en/Data Structures/Linked Lists/Doubly Linked List.md

@@ -103,7 +103,7 @@ class LinkedList {
 ## Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/lists/DoublyLinkedList.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Data%20Structure/Doubly%20Linked%20List.cpp)
+- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/doubly_linked_list.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/doubly_linked_list.py)
 - [Go](https://github.com/TheAlgorithms/Go/blob/master/data-structures/linked-list/double-linkedlist.go)
 - [Ruby](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/linked_lists/double_list.rb)

Diff for: en/Data Structures/Linked Lists/Singly Linked List.md

@@ -40,7 +40,7 @@ class LinkedList {
 ## Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/datastructures/lists/SinglyLinkedList.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Data%20Structure/Linked%20List.cpp)
+- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/linked_list.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/singly_linked_list.py)
 - [Ruby](https://github.com/TheAlgorithms/Ruby/blob/master/data_structures/linked_lists/single_list.rb)
 

Diff for: en/Search Algorithms/Binary Search.md

@@ -41,7 +41,7 @@ A simple Binary Search implementation may return -1 as 9 is not present in the a
 #### Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/searches/BinarySearch.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Search/Binary%20Search.cpp)
+- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/search/binary_search.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/searches/binary_search.py)
 - [C-Sharp](https://github.com/TheAlgorithms/C-Sharp/blob/master/searches/binary_search.cs)
 - [C](https://github.com/TheAlgorithms/C/blob/master/searching/Binary_Search.c)

Diff for: en/Search Algorithms/Linear Search.md

@@ -36,7 +36,7 @@ Linear Search should return -1 as 6 is not present in the array
 #### Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/searches/LinearSearch.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Search/Linear%20Search.cpp)
+- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/search/linear_search.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/searches/linear_search.py)
 
 #### Video Explanation

Diff for: en/Selection Algorithms/Quick Select.md

@@ -41,10 +41,6 @@ Let's say k = 4. ie. We have to find 4th smallest element.
 4. As position of '7' is 4th (ie. k). Thus we will simply return 7
 ```
 
-### Code Implementation Links
-
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/selecting/quickSelect.cpp)
-
 ### Helpful Video Links
 
 [Video explaining how to find the Kth smallest/largest element in varying complexities](https://youtu.be/hGK_5n81drs)

Diff for: en/Sorting Algorithms/Quick Sort.md

@@ -69,7 +69,7 @@ it.
 #### Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/QuickSort.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Sorting/Quick%20Sort.cpp)
+- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/sorting/quick_sort.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/sorts/quick_sort.py)
 - [Ruby](https://github.com/TheAlgorithms/Ruby/blob/master/sorting/quicksort.rb)
 

Diff for: en/Sorting Algorithms/Selection Sort.md

@@ -52,7 +52,8 @@ The array is now sorted.
 #### Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/SelectionSort.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Sorting/Selection%20Sort.cpp)
+- [C++ Iterative](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/sorting/selection_sort_iterative.cpp)
+- [C++ Recursive](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/sorting/selection_sort_recursive.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/sorts/selection_sort.py)
 - [Go](https://github.com/TheAlgorithms/Go/blob/master/sorts/selection_sort.go)
 - [Ruby](https://github.com/TheAlgorithms/Ruby/blob/master/Sorting/selection_sort.rb)

Diff for: en/Sorting Algorithms/Shell Sort.md

@@ -57,7 +57,7 @@ Initial Gap: 4
 #### Code Implementation Links
 
 - [Java](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/sorts/ShellSort.java)
-- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/Sorting/Shell%20Sort.cpp)
+- [C++](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/sorting/shell_sort.cpp)
 - [Python](https://github.com/TheAlgorithms/Python/blob/master/sorts/shell_sort.py)
 - [C-Sharp](https://github.com/TheAlgorithms/C-Sharp/blob/master/sorts/shell_sort.cs)
 - [Go](https://github.com/TheAlgorithms/Go/blob/master/sorts/shell_sort.go)