计算哈希表中的字符串数

So, I am trying to count the number of strings present in my hash table. For some reason, this function always returns 0. I have tried re-writing it a couple of times in slightly different ways to find an error in the logic, but, as far as I know, this function should output the number of entries in the table. I would really appreciate some help, as this has become very frustrating! Thanks! So, I am trying to count the number of strings