Thread: Help with program.

So I was learning about linked list and I created a method to delete the list, I am getting run-time error(unusual flow of control) with the goto statement in main function which I'm using as a looped confirmation prompt, here:

Code:

#include <stdio.h>#include <stdlib.h>
struct Node{
    int data;
    struct Node *next;
}*head;
struct Node* push(struct Node *current_head, int new_data)
{
    struct Node* new_node = (struct Node*)malloc(sizeof(struct Node));
    new_node->data = new_data;
    new_node->next = current_head;
    return new_node;
}
void displayList(struct Node* current_head)
{
  while(current_head != NULL){
      printf("%d\n", current_head->data);
      current_head = current_head->next;
  }
}
struct Node* deleteList(struct Node* current_head){
    struct Node *next;
    while(current_head != NULL){
        next = current_head->next;
        free(current_head);
        current_head = next;
    }
    printf("The list is deleted.");
    return current_head;
}
int main(){
    int num;
    puts("Enter the elements:(-1 to end)");
    while(num != -1){
        scanf("%d", &num);
        if(num != -1)
            head = push(head, num);
        else
            break;
    }
    puts("Displaying the List:");
    displayList(head);
    puts("Do you want to empty list before exiting?");
    askAgain: {
        puts("Y or N?");
        char choice;
        scanf("%c", choice);
        if(choice == 'Y' || choice == 'N' || choice == 'n' || choice == 'y')
        {
          if(choice == 'Y' || choice == 'y'){
              head = deleteList(head);
            }
          }
          else
          {
            printf("Invalid Input. Try again:");
            goto askAgain;
          }
        }
    return 0;
}