using System;

namespace atm_program

{

    public class ab

    {

        public static void Main(String[] args)

        {

            int amt=10000,a,current,pin=4040,pin1,pin2;

​

            //read PIN

            Console.WriteLine("Enter the pin");

            pin1=int.Parse(Console.ReadLine());

​

            //compare PIN

            if(pin1==pin)

            {

                Console.WriteLine("1.To check balance");

                Console.WriteLine("2.To withdraw money");

                Console.WriteLine("3.To deposite Money");

                Console.WriteLine("4.To change the pin");

                Console.WriteLine("Enter your choice");

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

                switch(ch)

                {

                    case 1:

                        Console.WriteLine("The current balance in your account is " +amt);

                    break;

                    case 2:

                    Console.WriteLine("Enter the amount to withdraw");

                    {

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

                        if(amt>=a)

                        {

                            if(a%100==0)

                            {

                                Console.WriteLine("Please collect the cash"+a);

                                current=amt-a;

                                Console.WriteLine("The current balance is now"+current);

                            }

                            else

                                Console.WriteLine("Please enter the amount to withdraw in the multiples of 100");

                        }

                        else

                        Console.WriteLine("Your account does not have sufficient balance");

                    }

​

                    break;

​

                    case 3:

                    Console.WriteLine("Enter the amount to be deposite");

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

                    current=amt+a;

                    Console.WriteLine("The current balance in the account is"+current);

                    break;

                    case 4:

                    Console.WriteLine("Want to change your pin");

                    Console.WriteLine("Enter your previous pin");

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

                    if(prepin==pin)

                    {

                        Console.WriteLine("Enter your new pin");

                        pin2=int.Parse(Console.ReadLine());

                        pin1=pin2;

                        Console.WriteLine("Your pin is changed");

                    }

                    else

                        Console.WriteLine("Enter your correct pin");

                    break;

                    default:

                    Console.WriteLine("Please select correct option");

                    break;

                }

            }

            else

                Console.WriteLine("Pin is wrong");

        }

    }

}

​