delete a node at nth position IN C++

please i am having problems deleting from any position given in a linked list. i had done it for the first position and last position of my list and it works fine but tried it for nth position but it gives me run time error please whats wrong with my code. here the code below, thanks for your help in advance

class node{
public:
        int number;
        node *next;
};
class Box{
public:
void insertAsFirstElement(node *&head, node *&last,int number);
void insert(node *&head, node *&last,int number);
void remove(node *&head, node *&last);
void showList(node *current);
};
bool isEmpty(node *head)
{
    if(head == NULL)
        return true;
    else
        return false;
}
char menu()
{
    char choice;
    cout<<"Menu"<<"1. Add an item.\n"<<"2. Remove an item.\n"<<"3. Show the list.\n"<<"Exit\n";
    cin >> choice;
    return choice;


}
void insertAsFirstElement(node *&head, node *&last,int number)
{
    node *temp = new node;
    temp->number = number;
    temp->next = NULL;
    head = temp;
    last = temp;

}
void insert(node *&head, node *&last,int number)
{
    if(isEmpty(head))
        insertAsFirstElement(head, last, number);
    else
    {node *temp = new node;
    temp->number = number;
    temp->next = NULL;
    last->next = temp;
    last = temp;

    }
}
void remove(node *&head, node *&last,int number)
{
    cin>>number;
    node *temp = new node;
    if(isEmpty(head))
        cout<< "this list is already empty.\n";
    else if (head == last)
    {

    delete head;
    head = NULL;
    last = NULL;
    }


    else
    {for(int i = 0; 1< number-2; i++)
    /*node *temp = head;
    head = head->next;
    delete temp;*/
    node *temp = head;
    head = head->next;
    temp= temp->next;
    node* temp2 = temp->next;
    temp->next = temp2->next;
    delete temp2;
    }
}
void showList(node *current)
{ if(isEmpty(current))
 cout << "The list is empty\n";
 else{
 cout << "The list contains:\n";
 while(current != NULL)
 {cout << current->number << endl;
 current = current->next;
 }}}


int main(){
    node *head = NULL;
    node *last = NULL;
    char choice;
    int number;
    do{
        choice = menu();
         switch (choice)
         {
         case'1': cout << "please enter a number: ";
             cin >> number;
             insert (head,last,number);
             break;
         case'2': remove(head,last,number);
             break;
         case '3': showList(head);
             break;
         default: cout<< "System exit\n";
         }

    }while (choice !='4');
}