#include <iostream>
#include <cstdlib>

const int MAX_QUEUE_SIZE = 100;

class JobQueue {
private:
    int queue[MAX_QUEUE_SIZE];
    int front, rear;

public:
    JobQueue() {
        front = -1;
        rear = -1;
    }

    bool isFull() {
        return rear == MAX_QUEUE_SIZE - 1;
    }

    bool isEmpty() {
        return front == -1;
    }

    void enqueue(int job) {
        if (isFull()) {
            std::cout << "Queue is full. Job cannot be added.\n";
        } else {
            if (isEmpty()) {
                front = 0;
            }
            rear++;
            queue[rear] = job;
            std::cout << "Job " << job << " added to the queue.\n";
        }
    }

    void dequeue() {
        if (isEmpty()) {
            std::cout << "Queue is empty. No job to delete.\n";
        } else {
            int job = queue[front];
            if (front == rear) {
                front = rear = -1;
            } else {
                front++;
            }
            std::cout << "Job " << job << " deleted from the queue.\n";
        }
    }

    void display() {
        if (isEmpty()) {
            std::cout << "Queue is empty.\n";
        } else {
            std::cout << "Job Queue: ";
            for (int i = front; i <= rear; i++) {
                std::cout << queue[i] << " ";
            }
            std::cout << "\n";
        }
    }
};

int main() {
    JobQueue jobQueue;
    int choice, job;

    while (1) {
        std::cout << "Job Queue Simulation Menu:\n";
        std::cout << "1. Add a job to the queue\n";
        std::cout << "2. Delete a job from the queue\n";
        std::cout << "3. Display the queue\n";
        std::cout << "4. Quit\n";
        std::cout << "Enter your choice: ";
        std::cin >> choice;

        switch (choice) {
            case 1:
                std::cout << "Enter the job number: ";
                std::cin >> job;
                jobQueue.enqueue(job);
                break;

            case 2:
                jobQueue.dequeue();
                break;

            case 3:
                jobQueue.display();
                break;

            case 4:
                exit(0);

            default:
                std::cout << "Invalid choice. Please try again.\n";
        }
    }

    return 0;
}