//Author:Shawn

//Email:[email protected]

const int MAX_SIZE = 10;

class ListQueue<T> {

int count = 0;

List<T?> queue = List.filled(MAX_SIZE, null);

//Checks if the queue has elements (not empty)

bool hasElements() {

if (queue.length == 0) {

return false;

} else {

return true;

}

}

//Add an element to the queue

void enque(T element) {

if (count == MAX_SIZE) {

print("The queue is full!!!");

} else {

queue[count] = element;

count++;

}

}

//Takes the next element from the queue

T? deque() {

T? result = null;

if (count == 0) {

print("The queue is empty!!!");

} else {

result = queue[0];

for (int i = 0; i < queue.length - 1; i++) {

queue[i] = queue[i + 1];

}

}

return result;

}

}

void main() {

ListQueue<int> Queue = new ListQueue<int>();

Queue.enque(12);

Queue.enque(2);

Queue.enque(7);

print(Queue.queue);

print("Enqueue:");

var returnData = Queue.deque();

print("$returnData\n");

print("Enqueue:");

returnData = Queue.deque();

print("$returnData\n");

print("Enqueue:");

returnData = Queue.deque();

print("$returnData\n");

print("Now the queue is: " + (Queue.queue).toString());

}