fix : display function removed

DIRECTORY.md

@@ -58,6 +58,7 @@
   * [Stack](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/stack.h)
   * [Stack Using Array](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/stack_using_array.cpp)
   * [Stack Using Linked List](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/stack_using_linked_list.cpp)
+  * [Tempcoderunnerfile](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/tempcoderunnerfile.cpp)
   * [Test Queue](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/test_queue.cpp)
   * [Test Stack](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/test_stack.cpp)
   * [Test Stack Students](https://github.com/TheAlgorithms/C-Plus-Plus/blob/master/data_structures/test_stack_students.cpp)

data_structures/reverse_a_linked_list.cpp

@@ -121,10 +121,9 @@ int list::top() {
     if (!isEmpty()) {
         int n = head->val;
         return n;
+    } else {
+        return 0;
     }
-    else
-    return 0;
-    
 }
 /**
  * function to find the last element of the list
@@ -138,9 +137,8 @@ int list::last() {
             t = t->next;
         }
         return t->val;
-    }
-    else return 0;
-    
+    } else
+        return 0;
 }
 }  // namespace linked_list
 }  // namespace data_structures

data_structures/temporary_code_runner.cpp

@@ -1,190 +0,0 @@
-/**
- * @file
- * @brief Implementation of reversing a single linked list algorithm.
- * @details
- * The linked list is a data structure used for holding a sequence of
- * values, which can be added, displayed,reversed or removed.
- * ### Algorithm
- * Values can be added by iterating to the end of a list(by following
- * the pointers) starting from the first link. Whichever link points to null
- * is considered the last link and is pointed to the new value.
- *
- * Linked List can be reversed by using 3 pointers: current, previous, and
- * next_node; we keep iterating until the last node. Meanwhile, before changing
- * to the next of current, we store it in the next_node pointer, now we store
- * the prev pointer in the current of next, this is where the actual reversal
- * happens. And then we move the prev and current pointers one step forward.
- * Then the head node is made to point to the last node (prev pointer) after
- * completion of an iteration.
- * Graphic Explanation:https://bit.ly/3nbVrFe
- */
-#include <cassert>   /// for assert
-#include <iostream>  /// for I/O operations
-#include <memory>    /// for dynamic memory
-
-/**
- * @namespace data_structures
- * @brief Data Structures algorithms
- */
-namespace data_structures {
-/**
- * @namespace linked_list
- * @brief Functions for singly linked list algorithm
- */
-namespace linked_list {
-/**
- * A Node class containing a value and pointer to another link
- */
-class Node {
- public:
-    int val;     /// value of the current link
-    Node *next;  /// pointer to the next value on the list
-};
-
-/**
- * A list class containing a sequence of links
- */
-class list {
- private:
-    Node *head = nullptr;  // link before the actual first element
- public:
-    /**
-     * List constructor. Initializes the first link.
-     */
-    list() {
-        // Initialize the first link
-    }
-    bool isEmpty();
-    void insert(int32_t new_elem);
-    void reverseList();
-    void display();
-    int top();
-    int last();
-};
-
-/**
- * function checks if list is empty
- * @returns true if list is empty
- * @returns false if list is not empty
- */
-bool list::isEmpty() {
-    if (head == nullptr) {
-        return true;
-    } else {
-        return false;
-    }
-}
-
-/**
- * function adds new element to the end of the list
- * @param new_elem to be added to the end of the list
- */
-void list::insert(int32_t n) {
-    Node *new_node = new Node();
-    Node *temp = nullptr;
-    new_node->val = n;
-    new_node->next = nullptr;
-    if (isEmpty()) {
-        head = new_node;
-    } else {
-        temp = head;
-        while (temp->next != nullptr) {
-            temp = temp->next;
-        }
-        temp->next = new_node;
-    }
-}
-
-/**
- * function reverseList for reversing the  list
- * @brief Using current,previous and next pointer.
- * @returns 'void'
- */
-void list::reverseList() {
-    Node *curr = head;
-    Node *prev = nullptr, *next_node = nullptr;
-    while (curr != nullptr) {
-        next_node = curr->next;
-        curr->next = prev;
-        prev = curr;
-        curr = next_node;
-    }
-    head = prev;
-}
-
-/**
- * function to find the top element of the list
- * @returns 'int n'
- * @brief returns the first element in the list
- */
-int list::top() {
-    if (!isEmpty()) {
-        int n = head->val;
-        return n;
-    }
-}
-/**
- * function to find the last element of the list
- *  @returns 'int t->val'
- *  @brief returns the last element of the list
- */
-int list::last() {
-    if (!isEmpty()) {
-        Node *t = head;
-        while (t->next != nullptr) {
-            t = t->next;
-        }
-        return t->val;
-    }
-}
-
-/**
- * function displays all the elements in the list
- * @returns 'void'
- */
-void list::display() {
-    if (!isEmpty()) {
-        Node *node = head;
-        while (node != nullptr) {
-            std::cout << node->val << "\t";
-            node = node->next;
-        }
-        std::cout << std::endl;
-    }
-}
-
-}  // namespace linked_list
-}  // namespace data_structures
-
-/**
- * @brief Self-test implementations
- * @returns void
- */
-static void test() {
-    data_structures::linked_list::list L;
-    // 1st test
-
-    L.insert(11);
-    L.insert(12);
-    L.insert(15);
-    L.insert(10);
-    L.insert(12);
-    L.insert(20);
-    L.insert(18);
-    assert(L.top() == 11);
-    assert(L.last() == 18);
-    L.reverseList();
-    // Reversal Testing
-    assert(L.top() == 18);
-    assert(L.last() == 11);
-    std::cout << "Passed" << std::endl;
-}
-
-/**
- * @brief Main function
- * @returns 0 on exit
- */
-int main() {
-    test();  // run self-test implementations
-    return 0;
-}