What is problem in my code?

#1

#include
using namespace std;
class node{
public:
int data;
node *next;
node(int d){
data=d;
next=0;
}
};
void insert_at_tail(node *&head,int data){
if(head==0){
head=new node(data);
return;
}
node *tail=head;
while(tail->next!=0){
tail=tail->next;
}
tail->next=new node(data);
return;
}
void print(node *head){
while(head->next!=0){

		 	cout<<head->data<<" ";
		 		head=head->next;
		 }
		 cout<<head->data<<endl;
	}
	void append(node *&head,int k,int n){
		node *temp=head;
		node *tail=head;
		int i=1;
		while(tail->next!=0){
			tail=tail->next;
			if(n-k>i){
			temp=temp->next;	
			}
			i++;
		}
		tail->next=head;
		head=temp->next;
		temp->next=0;
		return;
	}

int main(){
int n;
node *head=0;
cin>>n;
for(int i=0;i<n;i++){
int data;
cin>>data;
insert_at_tail(head,data);
}
int k;
cin>>k;
append(head,k,n);
print(head);
return 0;
}

#2

@abheysingla2310 it was not mentioned in the question but k can be greater than n and for that you have to do k=k%n , here did it


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