You are asked to write a program which stores information of given products.
Your program should be menu driven. The program menu should include the following options:
1. Add product information (Ask user to input product id, name and price)
2. Change product price (Ask the id of the product that user wants to update)
3. List all products
4. Delete product by product id
Use linked list to store product informations.
When you add a product on the list, the products should be stay sorted by their ids.