I need help for this code

Make a code in c ++ simulating a company that makes use of a catalog where interested parties can search, save or modify information regarding the products that the company handles. This system is aimed at three main sectors: administrative staff, clients and third parties interested in the platform, such as students.

When the interested person opens the program for execution, he asks what type of user he is and the interested party must enter if he is an administrative, client or student. Depending on the answer, the program acts as described below.

If administrative staff is detected to be logging in, you will be prompted to enter your username and password. Once inside, the program allows you to manage and control the sales movements of the aircraft, creating an inventory to be able to have a better control of what is in stock.

In the event that the user to enter is a client, whether habitual or potential, they are asked to enter the name of the company to which they belong or their own as a natural person. After this, you are given the option to choose a model that you are interested in. Once selected, the program displays an informative note about said model including data such as full name, cost or benefits, in addition to giving you the option to select it for later purchase, saving the model and price data to show it to the customer if necessary. you want to consolidate the purchase.

Finally, if the user registers that he is a student from outside the company, the program only gives him the option of knowing the complete catalog of the products, including their characteristics, even if they are not in stock.