How do I permenantly delete a row of arrays and shift a row of arrays upwards?

I've been assigned by school to create an application that contains a book list with 20 different books in it and build a menu with following options:

(a) List – Display the list in tabular format. Each display should contain an appropriate heading and column captions;

(b) Search – Search for a book record in the list using the ISBN and print the full record for the book;

(c) Delete – Delete an existing book record from the list;

(d) Exit – Stop the program.

Here is the sample of my program:

#include <iostream>
#include <iomanip>
#include <fstream>
#include <cstring>
#include <cctype>

using namespace std;

typedef struct
{
    char code[50];
    char author[50];
    char name[50];
    char edition[50];
    char publish[50];
    char price[50];
} BOOK_LIST;

void list         (BOOK_LIST book[], int rows);
void showBook    (BOOK_LIST book[], int rows);
void updateRecord  (BOOK_LIST book[], int rows);
void advancedSearch (BOOK_LIST book[], int rows);
int deleteBook (BOOK_LIST book[], int rows);
int  searchBook(BOOK_LIST book[], int rows);

int main()
{
    ifstream inFile("list.txt");

if(!inFile)
    cout << "Error opening input file\n";
else
{

    BOOK_LIST books[50];
    int index = -1, choice;

    inFile.getline(books[++index].code, 50);
    while(inFile)
    {
        if(inFile.peek() == '\n')
            inFile.ignore(256, '\n');
        inFile.getline(books[index].author, 50);
        inFile.getline(books[index].name, 50);
        inFile.getline(books[index].edition, 50);
        inFile.getline(books[index].publish, 50);
        inFile >> books[index].price;

        // read next number
        inFile >> books[++index].code;
    }
    inFile.close();

    // menu starts
    do
    {
        cout << "Do you want to:\n";
        cout << "1. List all books\n";
        cout << "2. Get details about a book\n";
        cout << "3. Delete a book from the list\n";
        cout << "4. Exit\n";
        cout << "5. Advanced Search\n";
        cout << "Enter choice: ";
        cin >> choice;

        switch (choice)
        {
            case 1 : list(books, index);
                     break;
            case 2 : showBook(books, index);
                     break;
            case 3 : updateRecord(books, index);
                     break;
            case 5 : advancedSearch(books, index);
            case 4 : break;

            default: cout << "Invalid choice\n";
        }
    } while (choice != 4);

    ofstream outFile("list.txt");
    if(!outFile)
        cout << "Error opening output file, records are not updated.\n";
    else
    {
        for (int i = 0; i < index; i++)
        {
            outFile << books[i].code << endl;
            outFile << books[i].author << endl;
            outFile << books[i].name << endl;
            outFile << books[i].edition << endl;
            outFile << books[i].publish << endl;
            outFile << books[i].price << endl;
        }
        outFile.close();
    }
}
return 0;
}

void list(BOOK_LIST book[], int rows)
{
    cout << fixed << setprecision(2);
    cout << "ISBN\t        Author          BookName        Edition\tPublisher\t Price\n";
    for (int i = 0; i < rows; i++)
        cout << book[i].code << "\t" << book[i].author << "\t"
             << book[i].name << "\t" << book[i].edition << "\t"
             << book[i].publish << "\t"
             << " " << book[i].price << endl;   
    return;
}

int searchBook(BOOK_LIST book[], int rows)
{
    int i = 0;
    bool found = false;
    char code[50];

cout << "Enter an ISBN code of a book to search: ";
fflush(stdin);
cin.getline(code, 50);

while (i < rows && !found)
{
    if (strcmp(code, book[i].code) == 0)
        found = true;
    else
        i++;
}
if (found)
    return i;
else
    return -1;
}

void showBook(BOOK_LIST book[], int rows)
{
int pos = searchBook(book, rows);
if (pos != -1)
{
    cout << "Author is " << book[pos].author << endl;
    cout << "Book name is "<< book[pos].name << endl;
    cout << book[pos].edition << " Edition" << endl;
    cout << "The publisher of this book is " << book[pos].publish <<  endl;
    cout << "Current price is " << book[pos].price << endl;
}
else
    cout << "Product not found\n";

return;
}

void updateRecord(BOOK_LIST book[], int rows)
{
int pos = deleteBook(book, rows);
char code [50];
int i,j = 0;

    for(i = 0; i < rows ; i++)
    {
        if(strcmp(code, book[i].code))
        {
            strcpy(book[j].code , book[i].code);
            strcpy(book[j].author, book[i].author);
            strcpy(book[j].name, book[i].name);
            strcpy(book[j].edition, book[i].edition);
            strcpy(book[j].publish, book[i].publish);
            strcpy(book[j].price, book[i].price);

            j++;
        }//if
        else
        {
            i++;

        strcpy(book[j].code, book[i].code);
        strcpy(book[j].author, book[i].author);
        strcpy(book[j].name, book[i].name);
        strcpy(book[j].edition, book[i].edition);
        strcpy(book[j].publish, book[i].publish);
        strcpy(book[j].price, book[i].price);

        j++;

    }//else

}//for
return;
}

int deleteBook (BOOK_LIST book[], int rows)
{
int i = 0;
bool found = false;
char code[50];

cout << "Enter an ISBN code of a book to delete: ";
fflush(stdin);
cin.getline(code, 50);

while (i < rows && !found)
{
    if (strcmp(code, book[i].code) == 0)
        found = true;
    else
        i++;
}
if (found)
    return i;
else
    return -1;
}

void advancedSearch (BOOK_LIST book[], int rows)
{

char advanced[50];
cout << "Please enter either the author's name or the book name to search: ";
fflush(stdin);
cin.getline(advanced, 50);

for(int i = 0; i < rows; i++)
{

    if(strstr(book[i].author, advanced) || strstr(book[i].name, advanced))
    {
        cout << "ISBN is " << book[i].code << endl;
        cout << "Author is " << book[i].author << endl;
        cout << "Book name is " << book[i].name << endl;
        cout << book[i].edition << " Edition" << endl;
        cout << "Publisher is " << book[i].publish << endl;
        cout << "Current price is " << book[i].price << endl;
    }

}

return ;
}

The problem starts here: When I want to permanently delete a whole row of book record. But the book record is still there after deleting.

First, this is my menu, then I press 1 to check the list for the IBSN. Then, I press 3 to proceed to the deleting part. At that time, I choose TheHost to delete. After the deleting, to ensure that I have deleted the chosen book, so I press 1 to check the list again, but unfortunately the book is still there. Please take a look at my menu *I don't have much reputation that what I can do to let you know my problem, please let me know if my question is uncleared.

If I am able to delete a book record, and how do I delete a record permanently? And after deleting a record, how do I move the remaining records upwards, so that it won't leave any empty row there?

The function for the deleting:

void updateRecord(BOOK_LIST book[], int rows)
    {
    int pos = deleteBook(book, rows);
    char code [50];
int i,j = 0;

    for(i = 0; i < rows ; i++)
    {
        if(strcmp(code, book[i].code))
        {
            strcpy(book[j].code , book[i].code);
            strcpy(book[j].author, book[i].author);
            strcpy(book[j].name, book[i].name);
            strcpy(book[j].edition, book[i].edition);
            strcpy(book[j].publish, book[i].publish);
            strcpy(book[j].price, book[i].price);

            j++;
        }//if
        else
        {
            i++;

        strcpy(book[j].code, book[i].code);
        strcpy(book[j].author, book[i].author);
        strcpy(book[j].name, book[i].name);
        strcpy(book[j].edition, book[i].edition);
        strcpy(book[j].publish, book[i].publish);
        strcpy(book[j].price, book[i].price);

        j++;

    }//else

}//for
return;
}

The Text file that I used in this program a.k.a the BOOK_LIST