C++ please and please make different .h files. Will thumbs up thx!

The direct user of this program is a bank employee which uses the program to provide services to the bank customers. In the following, different entities that this application deals with are described. a) Bank i) Bank has a name. ii) It has an address iii) The bank has working hours iv) Each customer can open a bank account in the bank. v) Each bank account consists of potentially multiple saving sub-accounts and checking sub- accounts. vi) Bank offers a $100 bonus to the first saving sub-account of each customer. vii) Customers should be able to deposit to or withdraw from their sub-accounts. viii)A bank should be able to tell the number of bank accounts that it has ix) A bank should be able to tell the number of saving sub-accounts that it has x) A bank should be able to tell the number of checking-accounts that it has xi) It should be able to show the information of its accounts sorted based on their balances xii) It should provide a menu for the bank employee to choose from different services (1) See the number of bank accounts (2) See the number of saving accounts (3) See the number of checking accounts (4) Open a bank account (5) Close a bank account using its bank account number. (6) See information of an account and modify it based on its account number (7) See detailed information of all of the accounts (8) See brief information of all of the accounts sorted based on their aggregated balance. Just show the account number and the aggregated balance for each account