您的递归版本需要输入:

Your recursive version needs an input:

void List::PrintListRecursively(Node* curr)
{
    if (curr==NULL)
    {
        cout << "
";
        return;
    }
    cout << curr->data <<endl;
    PrintListRecursively(curr->next);
}

然后你会使用头指针调用它:

Which you would then call using the head pointer:

list.PrintListRecursively(list.GetHead());

或者你可以创建一个不带参数的版本:

Or you could create a version that takes no parameters:

void List::PrintListRecursively()
{
    PrintListRecursively(GetHead());
}

调用带指针参数的版本.

Which calls the version that takes the pointer parameter.