Linked list: stored elements are not displaying completely - stored-procedures

Question

I am trying to store 5 elements in linked, the input code is working fine but the display code is not showing the 5th element "RollNumber".
I can't find where I did the mistake.
class Node
{
friend class LinkedList;
private:
string BookName;
string BookNo;
string Price;
string StudentName;
string RollNumber;
Node *next;
public:
Node(string bname = "", string bno = "", string pr = "", string sname = "", string rn = "", Node *nxt = NULL)
{
BookName=bname;
BookNo=bno;
Price=pr;
StudentName=sname;
RollNumber:rn;
next=nxt;
}
};
class LinkedList
{
private:
Node *head;
Node *tail;
int count;
public:
LinkedList()
{
head = NULL;
tail = NULL;
count = 0;
}
bool isEmpty()
{
if (head == NULL)
{
return true;
}
return false;
}
void add_input_head(string bname = "", string bno="", string pr="", string sname="", string rn="")
{
if (isEmpty())
{
head = new Node(bname, bno, pr, sname, rn, NULL);
tail = head;
count++;
}
else
{
Node *p = new Node(bname, bno, pr, sname, rn, head);
head = p;
count++;
}
}
void traverse()
{
Node *t = head;
for (int i = 1; i <= count; i++) {
cout <<endl<<endl<<endl<<endl<<"Book Name: "<< t->BookName << endl;
cout <<endl<<endl<<"Book No: "<< t->BookNo << endl;
cout <<endl<<endl<<"Price: "<< t->Price << endl;
cout <<endl<<endl<<"Stuent Name: "<< t->StudentName << endl;
cout <<endl<<endl<<"Roll No: "<< t->RollNumber << endl;
t = t->next;
}
}
void Exit()
{
cout<<"\t\t\tThank You for using this Program";
}
//Destructor for Linked List
~LinkedList()
{
Node *t;
while (head != NULL)
{
t = head;
head = head->next;
delete t;
}
head = NULL;
count = 0;
}
};
int main()
{
LinkedList l;
int ch;
string a,b,c,d,e;
do
{
cout<<"\n\t\t\t Press 1 for Addition";
cout<<"\n\t\t\t Press 2 for Display";
cout<<"\n\t\t\t Press 3 for Exit";
cout<<"\n\t\t\t Enter Option=";
cin>>ch;
switch(ch)
{
case 1:
cout<<endl<<endl<<endl<<endl<<"Enter Book Name: ";
cin>>a;
cout<<endl<<"Enter Book No: ";
cin>>b;
cout<<endl<<"Enter Price: ";
cin>>c;
cout<<endl<<"Enter Student Name: ";
cin>>d;
cout<<endl<<"Enter Roll No: ";
cin>>e;
l.add_input_head(a,b,c,d,e);
break;
case 2:
l.traverse();
case 3:
l.Exit();
break;
}
}while(ch!=6);
}
There is no error while compiling but it still misses the last element. I don't know if the error is in input or output function.
I am making a class project and I am unable to resolve this issue.
Can somebody help me to find the mistake?