using System;

public class Program

{

              static int[] stk=new int[5];

              static int top=-1,size=5;

              public static void Main()

              {

                           while(true)

                           {

                           Console.WriteLine("1.push");

                           Console.WriteLine("2.pop");

                           Console.WriteLine("3.peek");

                           Console.WriteLine("4.traverse");

                           Console.WriteLine("5.exit");

                           Console.WriteLine("enter choice");

                           int ch=int.Parse(Console.ReadLine());

                                         if(ch==1)

                                         {

                                                       Console.WriteLine("Enter element:");

                                                       int ele=int.Parse(Console.ReadLine());

                                                       Pro.push(ele);

                                         }

                                         else if(ch==2)

                                         {

                                                       Pro.pop();

                                         }

                                         else if(ch==3)

                                         {

                                                       Pro.peek();

                                         }

                                         else if(ch==4)

                                         {

                                                       Pro.traverse();

                                         }

                                                       else if(ch==5)

                                                       {

                                                                    Console.WriteLine("exit:");

                                                                    break;

                                                       }

                           }

              }

              public class Pro

    {

              public static void push(int ele)

              {

                           if(isFull())

                           {

                                         Console.WriteLine("Full");

                           }

                           else

                           {

                                         top++;

                                         stk[top]=ele;

                                         Console.WriteLine("pushed");

                           }

              }

                           public static bool isFull()

                           {

                                         if(top==size-1)

                                                       return true;

                                         else

                                                       return false;

                           }

                           public static void pop()

                           {

                           if(isEmpty())

                           {

                           Console.WriteLine("Empty element");

                           }

                                         else{

                                         Console.WriteLine(stk[top] + "popped");

                                                       top--;

                                         }

                           }

                           public static bool isEmpty()

                           {

                           if(top==-1)

                                         return true;

                                         else

                                                       return false;

                           }

                           public static void peek()

        {

            if (isEmpty())

            {

                Console.WriteLine("Empty element");

            }

            else

            {

                Console.WriteLine("Top element: " + stk[top]);

            }

        }

                           public static void traverse()

        {

            if (isEmpty())

            {

                Console.WriteLine("Stack is empty");

            }

            else

            {

                Console.WriteLine("Elements in the stack:");

                for (int i = 0; i <= top; i++)

                {

                    Console.Write(stk[i] + " ");

                }

                Console.WriteLine();

            }

        }

  }                        

}

​