This is a small project with C language, for a bookshop
First give the name,address and telephoe number of book shop with "manage shop details" option.
And fill all informations within "manage shop details" option.
And also you can add item details via "manage shop details" -->"add new items to store" option.
Next you can use selling mode with pressing number 2.
Then choose items which customers are bying and press 0 to get the final bill.