Database Project | Chase Obuhanych | Professional Portfolio

In the spring 2025 semester, I created a bank database program in C and C++ that stores user records locally within files that are managed through the user interface. The functions include adding, removing, deleting, and finding records within the database. The records are read from a file upon starting the program, and written to when adding or deleting a record. The program is made to be user-friendly and can handle any input provided.

I worked on this project alone, writing the code for the functions, the user interface, and the makefile.

Through this project, I gained a deeper understanding of linked lists, pointers, debugging, and handling edge cases. Below is one of the functions used within my program.

int llist::addRecord(int accountno, char name[], char address[])
{
    #ifdef DEBUG
    cout << "DEBUG | Add function called successfully, parameters passed:\n";
    cout << "Account number: " << accountno << endl;
    cout << "Name: " << name << endl;
    cout << "Address: " << address << endl;
    #endif
    record* temp = new record;
    record* current = start;
    record* previous = NULL;

    temp->accountno = accountno;
    strcpy(temp->name, name);
    strcpy(temp->address, address);
    temp->next = NULL;

    if (start == NULL)
    {
        start = temp;
        return 0;
    }

    while (current != NULL)
    {
        if (current->accountno == accountno)
        {
            #ifdef DEBUG
            cout << "DEBUG | Duplicate account number found\n";
            #endif
            delete temp;
            return -1;
        }
        if (current->accountno > accountno)
        {
            temp->next = current;
            if (previous != NULL)
            {
                previous->next = temp;
            }
            else
            {
                start = temp;
            }
            return 0;
        }
        previous = current;
        current = current->next;
    }

    if (previous != NULL)
    {
        previous->next = temp;
    }
    return 0;
}