PLEASE SEPARATE EACH SOURCE CODE Expert Q&ADonePLEASE seperate each source fileQueueADTQueueADTFor this assignment, Imagine people entering a Queueor a Line and wait for a service, and leaves the Queueor Line after getting the service.Implement in C++ a QueueADT that does the following:1. gets the input ( person's first name) from theuser (from the keyboard)2. inserts (represents as if the person is entering aqueue or to wait in line for a service) the firstname into the Queue (your Queue ADT must beable to have a maximum of 20 names)3. your QueueADT must have the behaviors ofinserting, removing, and retrieving & displayingthe Queue on the screen after each event(either entry of a name into the queue, ORremoving name of the person leaving from thequeue.NOTE:Your QueueADT must implement ALL the Mainbehaviors of a typical Queue Data structuresuch as inserting (or enqueueing), removing (ordequeueing), displaying, etc. and any otherhelper• Implement using the Object-Oriented paradigm(the way we did an ADT in the class showingmodularity)• Make sure your application/user/client programshows an example of the use of each of themethods in your class, at least once.• Make sure you connent appropriately• Make sure your program is indented properly• Use a struct where needed• NO PLGIARISM in ANY FORM. The instructormay ask questions and not give any points if youcannot answer questions on the your programyou submitted.• Please make sure you submit the three codefiles (*.h, *.cpp, and *Main.cpp).• NO links, NO zipped files, OR other format filessuch as pdf, word, etc. (POINTS WILL BETAKEN OFF or WILL GET ZERO points)• Only other format file that is allowed is thescreen shots in (picture format)

Program Approach: Create the class personQueue which contains a string array to hold the person names and integer variables f and r to hold front and rear indexes. Create a default constructor for the class to assign -1 to f and r. Create function enQueue which takes a string name and adds it to the queue. If f is 0 and r is MAX(20) - 1. Print queue is full. Otherwise, If f is -1, assign 0 to f. Increment r. Assign name to position r in the queue array. Create a function deQueue which removes an element from the front of the queue. If f is -1, then print queue is empty. Otherwise, Get the string at position f in the queue. If f is greater than or equal to r, assign -1 to f and r. Otherwise, increment f. Print the name that is removed. Create a function displayQueue which traverses through the queue from the front to the rear and displays the elements one by one. Create a main function to implement the queue. Use a while loop to continue the operations until the user enters Y in cont. Display the menu to add, remove and display the queue. Take the choice input from the user. Switch the input. For case 1, take the person name from the user and call the enQueue function. Display the updated queue by calling the displayQueue function. For case 2, call the deQueue function. Display the updated queue by calling the displayQueue function. For case 3, call the displayQueue function. For default case, display wrong choice. Ask the user if they wish to continue and take input in cont.Code: #include <iostream>#define MAX 20using namespace std; class personQueue {private: string newQueue[MAX]; int f, r; public: personQueue(){ f = -1; r = -1;} void enQueue(string name){ if(f == 0 && r == MAX - 1){ cout <<"\nCannot add to a full queue..."; } else { if(f == -1) f = 0; r++; newQueue[r] = name; }} void deQueue(){ string name; if(f==-1){ cout<<"\nCannot add to an empty queue..."; } else { name = newQueue[f]; if(f >= r){ //only one element in queue f = -1; r = -1; } else { f++; } cout<<"\nRemoved "<<name<<" from the queue"; }} /* Function to display elements of Queue */void displayQueue(){ int i; if(f==-1) { cout << endl << "The queue is Empty!!" << endl; } else { cout << endl << "People in queue: "; for(i=f; i<=r; i++) cout << newQueue[i] << " "; }}}; int main(){int choice;string personName;char cont = 'Y';personQueue nq; while(cont=='Y'){cout<<"\n**Queue Operations**\n";cout<<"\n1. Add person";cout<<"\n2. Remove person";cout<<"\n3. Display queue";cout<<"\nEnter your choice: ";cin>>choice;switch(choice){ case 1: cout<<"\nEnter the first name of the person: "; cin>>personName; nq.enQueue(personName); nq.displayQueue(); break; case 2: nq.deQueue(); nq.displayQueue(); break; case 3: nq.displayQueue(); break; default: cout<<"\nWrong choice"; break; }cout<<"\n\nDo you wish to continue? Enter Y for Yes and N for No: ";cin>>cont;}; return 0;}Output Screenshots: