in c++ with 3 file .h and with header file , private and public

2]Description:This programming demonstrates a program that calculates a customer's bill for a local cable company. There are two types of customers:residentialandbusiness. There are two rates for calculating a cable bill: one for residential customers and one for business customers. From chapter 1 to 5, to test various inputs by the users, we have to close the DOS command prompt window.Your program will stop running when the user enter N or n to stop and Y or y is to continue running. Add option to allow the user to change Billing Processing Fee for either residential or business customers. If the user enter c or C, your program should give options

For residential customers the following rates apply:

Bill Processing Fee: $4.50

Basic Service Fee: $20.50

Premium channels: $7.50 per channels

For business customers the following rates apply:

Bill processing fee: $15.00

Basic Service Fee: $75.00 for first 10 channels, $5.00 for each additional connection

Premium channels: $50.00 per channel for any number of connections

The program should ask the user for an account number and a customer code. Assume that 'R' or 'r' stands for residential and 'B' or 'b' stands for Business. If the user enter code that is not R or r, B or b, an error message should be display. "You have entered in valid choice from the menu".

To calculate bill forresidential customers, total number of premium channels should be multiple by Premium channels rate and Bill Processing and Basic Service should be add to get amount due. As forbusiness customersbill, if number of basic customer is less than or equal to 10, the cost of the basic service connection is fixed. If the basic service connections is more than 10, you must most add the cost for each connection over 10.