$3\mathrm{.}3$ Required methods: ContactBook class

Default Constructor

Find $-$ Takes in a string that can either be a phone number or a name and returns the found contact as a pointer. Returns a nullptr if a given string is not a name or a number in the contact system.

Add $-$ Tabes in a contact object and stores its memory address in the furthest$-$most empty position in the array. The current order of contacts in the array must be preserved. $($Note: passing by value will result in a garbage pointer$).$ It returns nothing. Also know that there will never be a test case that tries to add a Contact that already exists in the ContactBook, and this applies for all the addition functions, even the operators.

AddContacts $-$ Takes in a vector of contact pointers, and stores all of it's values in the class's array, in the same order that they were in the vector. It returns nothing.

Remove $-$ Takes in a contact object, and removes the acsociated contact from the array. $($See the note in Add$)$ The rest of the contacts should stay in the same order in the array, which may mean you would have to shift all the pointers ahead in the array back one place. It returns nothing.

Display $-$ Displays each contact in the contact book, in the order that they are stored in the array. For example like this:

Roland, $456-789-0123$

Andres, $987-654-3210$

George, $234-567-8901$

Lily, $345-678-9012$

Justin, $123-456-7890$

Alphabetize $-$ sorts the array in alphabetical order based on contact name. Note that in this special case, Albert would come before Alberta. This should be the only function that can alter the order that the contacts are stored in the array.

the following operators:

@$t=$ Contact $-$ Adds a single contact to a ContactBook object

@$+=$ ContactBook $-$ Adds all contacts from the passed in ContactBook to this object. Adding them to the back in the order they are in the other ContactBook's array.

ContactBook $-$ Adds two contact books together and returns the resulting ContactBook.

Contact $-$ Removes the Contact that matches the passed$-$in Contact.

o $-=$ ContactBook $-$ Removes all contacts from a passed in ContactBook from this object

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