Insert a Node at the Tail of a Linked List

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    SinglyLinkedListNode* node = new SinglyLinkedListNode(num);

    Works.

    SinglyLinkedListNode *newNode = new SinglyLinkedListNode();

    solution.cc:61:62: error: no matching function for call to ‘SinglyLinkedListNode::SinglyLinkedListNode()

    So we do not have an empty constructor, but do have a constructor with parameters. The one who wrote the background of this task should be immediately exterminated.