Question

How to remove the last element from a queue in C#

Answer 1

using System;
using System.Collections;

class Program
{
    public static Queue queue;
    
    public static void PrintQueue() { 
        foreach (Object obj in queue) {
            Console.Write("{0} ", obj);
        }
    } 
    
    public static void RemoveLastElement() {
        Object first = queue.Peek();
        Object current = null;
       
        while (true) {
            current = queue.Dequeue();
            if (queue.Peek() == first) {
                break;
            }
            queue.Enqueue(current);
        }
    }

    static void Main() {
        queue = new Queue();
    
        queue.Enqueue(5); 
        queue.Enqueue(2); 
        queue.Enqueue(7); 
        queue.Enqueue(3); 
        queue.Enqueue(6); 
        queue.Enqueue(1); 
        queue.Enqueue(9); 

        PrintQueue();

        RemoveLastElement();
        
        Console.WriteLine();
        
        PrintQueue();
    }
}



/*
run:

5 2 7 3 6 1 9 
5 2 7 3 6 1 

*/

 

70+ SQL courses for beginners and professionals