how I should Write a program in c++ that prompts the user to input a number. The program should then output the number and a message saying whether the number is positive, negative, or zero. the program should contain comments explaining your work.

C++ with multiple functions if possible Write a program to simulate an automated teller machine (ATM) at a bank. The program should ask the user for a four-digit personal identification number (PIN) to verify they are supposed to have access to the account. If they enter the PIN incorrectly, they should be denied access to the account, but the program should automatically ask them to enter the PIN again. It is up to you to decide if you want to give a maximum number of tries before exiting. The ATM program should ask the user for a beginning balance, and then provide the user with the opportunity to enter deposits and withdrawals until the user wishes to exit the program. Upon exiting the program, it needs to display the current balance.