When building the list its printing the first element twice can any one figure this out

#1

here is the code pls check

#2

in the inserttail function at line 29

void insertattail(node*&head,int data){
if(head == NULL) {
head = new node(data);
return; // add this return statement else 2 nodes were being formed
}

#3

Can i have any other alternative to build the list without using the end point as -1

#4

If so make the required change in the code https://ide.codingblocks.com/s/241682

#5

No sir it is the only way to take input
like thats how the question is designed so there is no other way