Project:Production Management System

I need 5 class .So I'm going to operate in five classes

I need 40 functions (For Example Add Update Display Remove) For each Class.When I use the add function in every class, I have 5 functions.

10 constraints (Constraints For example Every product has an id, but different products cannot have the same id.For example Cannot work with the same name)

----Please Give me Comment Line

It will be like the output below, but 5 classes and additions need to be made. I need C++

Welcome to the Production Management System! 1- Product Operations 2- Customer Operations 3- Stock Operations 4- Exit Please Choose One Action 1 Product Operations 1- Add Product 2- Remove Product 3- Update Product 4- Product List 5- Menu