Debug assertion failed for editing and deleting records - c

Question

I am a relatively new programmer currently learning the C language at college. For my project I have been tasked to design a library system for students, I have been experiencing a debug assertion failed-error whenever I try to delete the same book that has been recently edited. Can somebody help me on this question?
PS: I have to submit the program in a few days' time, so I need some help! D:
Here's my code for editing books:
void EditBookInformation()
{
int found = 0;
char user_input[5];
system("cls");
printf("You have selected Edit Book Information \n");
printf("Please enter the Book ID to edit the book: \n");
scanf_s(" %s", &user_input, 5);
fflush(stdin);
fopen_s(&BookList, "record.txt", "rb+");
fopen_s(&BookList2, "newrecord.txt", "wb+");
fopen_s(&Logsheet, "log.txt", "a+");
rewind(BookList);
rewind(BookList2);
while (fread(&Books, sizeof(Books), 1, BookList) != NULL)
{
if (strcmp(user_input, Books.Book_ID) == 0)
{
found = 1;
printf("Book has been found! \n");
printf("\nBook ID:%s \n", Books.Book_ID);
printf("Title:%s \n", Books.Title);
printf("Edition:%s \n", Books.Edition);
printf("Year of publication:%s \n", Books.Year_of_publication);
printf("Shelf location:%s \n", Books.Shelf_location);
printf("Price in RM:%s \n", Books.Price);
break;
}
else
{
fwrite(&Books, sizeof(Books), 1, BookList2);
}
}
if (!found)
{
printf("Book not found! \n");
_fcloseall();
system("pause");
system("cls");
main();
}
char confirm;
printf("\nDo you want to edit this book?");
scanf_s("%c", &confirm);
fflush(stdin);
if (confirm == 'y')
{
printf("New Title:");
scanf_s("%[^\n]s", &Books.Title, 50);
while (getchar() != '\n');
printf("New Edition:");
scanf_s("%s", &Books.Edition, 6);
while (getchar() != '\n');
NewYearInput:
printf("New Year of publication:");
scanf_s("%s", &Books.Year_of_publication, 5);
while (getchar() != '\n');
int length = strlen(Books.Year_of_publication);
int digit = 0;
if (length == 4)
{
for (; digit < length; digit++)
if (!isdigit(Books.Year_of_publication[digit]))
break;
}
if (digit != 4)
{
printf("Wrong input! Please enter 4 digits for year! \n");
system("pause>nul");
goto NewYearInput;
}
printf("New Shelf Location:");
scanf_s("%s", &Books.Shelf_location, 5);
while (getchar() != '\n');
printf("New Price in RM:");
scanf_s("%s", &Books.Price, 5);
while (getchar() != '\n');
fprintf(Logsheet, "Book edited: %s \n", Books.Title);
fseek(BookList, ftell(BookList) -sizeof(Books), SEEK_SET);
fwrite(&Books, 1, sizeof(Books), BookList);
fclose(BookList);
fclose(Logsheet);
printf("Book has been edited! \n");
printf("Press any key to return to main menu \n");
system("pause>nul");
system("cls");
main();
}
else if (confirm == 'n')
{
printf("You have cancelled your operation! \n");
_fcloseall();
system("cls");
main();
}
}
And here is my code for deleting books:
void DeleteBookByBookID()
{
int found = 0;
char user_input1[5];
system("cls");
printf("You have selected Delete Book \n");
printf("Please enter the Book ID that you want to delete the book \n");
scanf_s("%s", &user_input1, 5);
fflush(stdin);
fopen_s(&BookList, "record.txt", "rb+");
fopen_s(&BookList2, "newrecord.txt", "wb+");
fopen_s(&Logsheet, "log.txt", "a+");
rewind(BookList);
rewind(BookList2);
while (fread(&Books, sizeof(Books), 1, BookList) != NULL)
{
if (strcmp(user_input1, Books.Book_ID) == 0)
{
printf("Book found! \n");
found = 1;
}
else
{
fwrite(&Books, sizeof(Books), 1, BookList2);
}
}
if (!found)
{
printf("Book ID not found! \n");
_fcloseall();
system("pause");
system("cls");
main();
}
fclose(BookList);
fclose(BookList2);
char confirm;
printf("Do you want to delete this book? \n");
scanf_s(" %c", &confirm);
fflush(stdin);
if (confirm == 'y')
{
remove("record.txt");
rename("newrecord.txt", "record.txt");
fprintf(Logsheet, "Book deleted: %s \n", Books.Title);
printf("Book has been deleted! \n");
printf("Press any key to return to main menu \n");
system("pause>nul");
system("cls");
main();
}
else if (confirm == 'n')
{
printf("You have cancelled your operation! \n");
fclose(BookList);
fclose(BookList2);
system("cls");
main();
}
fclose(Logsheet);
}

Answer 1

If a book is not found, you are calling main. But main should not be called by the user. It is called by the system and is the start of your program. Maybe you mean return?
You are reading from BookList and if the record read is not the one you want, you write it to BookList2. Once the record is found, you edit it and then write it to BookList2 and then you close the files and rename the new file to the old file. But what happens to all the remaining records in the old file? Shouldn't you copy those too to the new file?
See also the comments to your post for other helpful sugestions.