What am i doing wrong ....and how to take user input without while(data!=-1)

#1
#2

in this question input format is different so you can’t use whie(data!=-1)

here you have given no of elements
for make a for loop


void buildList(node*&head){
    int n;
    cin>>n;
    for(int i=0;i<n;i++){
         cin>>data;
        insertAtTail(head,data);
    }
}
#3

i figured out the input .thanks please suggest the further mistakes in the code

#4

Modified Code

i have done some changes you can see

i hope this help
if you have more doubts regarding this feel free to ask
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