c++ - Adding Too Many Nodes -

i created data bag structure, text files consist of short stories , poems. first time instance of string inserted, datavalue contains string , datacount set one. if instance of same string inserted, datacount incremented. reason keeps outputting same word on , on , of strings contain count of 1 reason. there suggestions on adjust?

struct  bagnode { string datavalue; string datacopy; int datacount; bagnode * next; }; class bag{  private: bagnode * head; public: bag() {     head = null;  } void insert(string v) {     if(head == null){ //empty list         head = new bagnode;         removepunct(v);         head->datavalue = v;         transform(v.begin(), v.end(), v.begin(), ::tolower);         head->datacopy = v;         head->next = null;     }     else     {             bagnode * n = new bagnode;      // new node             removepunct(v);             n->datavalue = v;             transform(v.begin(), v.end(), v.begin(), ::tolower);             n->datacopy = v;             bagnode * current = head;           //for traversal             n->datacount = 1;                 if(current->datacopy > v)                 {                     n->next = head;                     head = n;                 }                 else{           //mid , tail insert                     while(current->next && current->next->datacopy < v){                                 current = current->next;                         }                             //check identical strings                             if(current->datacopy != v)                             {                                 n->next = current->next;                                 current->next = n;                             }                             else                             {                                 current->datacount++;                             }                      }             }         } 

output: 10annette (1) 1805 (1) 7 (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) , (1) , (1) , (1) , (1) , (1) , (1) , (4) anna (1) anna (1) antichristi (1) antichristi (1) (1) (1) arrive (1) (1) (1) (1) @ (1) attack (1) (1) being (1) believe (1) better (1) between (1) buonapartes (1) (1) (1) (1) (1) (1) call (1)