Lisp (help please)

[Jdourado]

1. Implement a function that allows the user to enter a list of products and their respective prices, so that this information is stored in a list organized by product-price pairs. To terminate data entry by the user, one must digitally end the word after the last product price-name. The list resulting from data entry should have a structure similar to the following:

Rice 5.00

Beans 4.00

Apple 2.00

Milk 2.50

 

* Orientations:

 

- In addition to recursion, you can use the loop command to implement the read loop.

- Define a global variable where the list will be stored at the end of the reading.

- Product-price pairs you can organize either as a cons, a sublist or a structure with product and price fields.

- Save the list structure to a text file for easier data entry and write a function that allows you to retrieve this data from the file.

 

 

2. Implement a function that only displays a menu so that the user can choose one of the operations of the system, as follows:

 

Search

Show products in alphabetical order

Shopping

 

 

3. Implement a function or set of functions, which, from the options menu and user input, perform the following tasks:

 

A) Price search for a product: allows the user to provide a name of a product and the program either says it did not find the product or displays its price.

 

B) Show products alphabetically: displays the entire list of products available with their prices on the screen.

 

C) Shopping: allows the user to provide product names and quantities that they want to buy. At the end the program issues a list of all products purchased and displays the total value of purchases.

[BIGAL]

Some answers

1 You can sort a list as example sort list x,y,z on Y value ie price

1 Save to a file YES write-line.

1 Read-line from file.

 

2 You can turn off a lot of stuff in Autocad like menu etc and on start up have your menu appear.

 

2-3 Functions like search YES can be done

 

4 Why do it in Autocad question to you Jdourado. ?

[Jdourado]

First I need to make a clip after playing for autocad

[Jdourado]

CLISP for gnum lisp