what am i going to do? we are tasked to create a shopping cart. Product list should be stored in a text file. I have it already, the thing is when the user would buy a certain quantity of a certain product, let say
item# price quantity
pencil $5.00 10
Mr. A bought 2 pencils totaling $10.00 to pay.
how do i get the quantity of the product in the list to change?