Answered: reate a simple program in c++ language…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Console

Monthly Sales program

COMMAND MENU

add - Add sales for a specified month

view - View sales for specified month

edit - Edit sales for specified month

totals - View sales summary for the year

exit - Exit program

Command: add

Three-letter Month: jan

Sales Amount: 10317

Sales amount for Jan is 10,317.00.

Command: add

Three-letter Month: feb

Sales Amount: 15293

Sales amount for Jan is 15,293.00.

Command: view

Three-letter Month: jan

Sales Amount: 14317

Sales amount for Jan is 14,317.00.

Command: edit

Three-letter Month: jan

Sales amount for Jan is 14,317.00.

Command: totals

Yearly total: 29,610.00

Monthly average: 14,805.00

Command: view

Three-letter Month: july

Invalid three-letter month.

Command: exit

Bye!

Specifications the program must have:

The program should use a list to store the sales data for each month with the three-letter abbreviation for the month (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, and Dec) as the key for each item.
When the program starts, it should read the sales data inserted from the user.
If the user edits the sales data, the program should edit the data
Must be able to use the add command to add the data for the given month inputted by the user
If the user selects totals, the program should calculate the total sales and average monthly sales.
Use functions to view sales, edit sales, calculate the total, and calculate average.

Expert Solution

Step 1

The Code for the above question is this : #Open the file and read all the content of txt dict = {} with open("monthly_sales.txt","r") as file : for line in file : (key, value) = line . split() dict[str(key)] = value # Split both the columns and store in the dictionary print(dict) choice = input() if(choice == "edit"): key = input("Which Year") value = int(input("Sales value?")) # Take the new Sales Value dict["key"] = value #Append the necessary data with open("monthly_sales.txt","w") as file : file . write('{} {}'.format(key,value)) file.close() #Closing the file You can see the update in the provided text file. Attaching the screenshot of the same. If still any doubt persist you can write in the comment section. Also if your querry is resolved please upvote.