This C++ program implements functions to perform operations on a singly linked list: 1. A create_node function allocates and returns a new node with the given value. 2. An insert_begin function inserts a new node at the beginning of the list, updating the start pointer. 3. A delete_begin function deletes the node at the beginning of the list, updating the start pointer and deallocating the node. 4. A display function traverses the list and prints out the values of each node.