Reference no: EM131427482

Objective:

• Practice working with a list of numbers.
• Practice writingfunction definitionsthat useparametersandreturna value.
• Practice using astring accumulator.

Instructions:

Your employer needs a program that analyzes the monthly sales figures for each division. 

Write a Python program that allows the user to enter a series of numbers and places the numbers (not string values) in a list.  Each number entered by the user is the monthly sales amount for one division.  Use a sentinel-controlled loop to get input from the user and place each value entered into the list as long as the value is not negative.  As soon as any negative value is entered, stop the loop (without putting that illegal value into the list).

One objective of this assignment is to apply algorithms we have studied to solve problems. You will do this by writing a function definitionto implement each algorithm.  Every function must get information only from its parameters, not from "global" variables.  Several of these tasks can also be accomplished with built-in functions.  In those cases, your code should demonstrate both approaches and show that the results are the same.

Add code to your program to do the following:

1. Write a function definition that uses a loopand astring accumulatorto produce andreturn astringresultthat includes the user-entered sales figures formatted to look similar to this when it is printed:
   {$12.95, $1,234.56, $100.00, $20.50}
   Notice the dollar signs, commas, digits after the decimal point, and curly braces.  Plan this one on paper before you start writing code.  Add code that calls this function and prints the result.
2. Show thehighestnumber in the list -- the sales leader! Do this in two ways. First, use the built-in 'max' function. Then, write your own 'max2' function definition that accomplishes the same thing by using a loop to find the highest value.
3. Show thelowestnumber in the list -- the sales loser. Do this in two ways. First, use the built-in 'min' function. Then, write your own 'min2' function definition that accomplishes the same thing by using a loop to find the lowest value.
4. Show the total sales for the company for the month -- thesumof all the numbers in the list. Once again, write a function definition that uses a loop and an accumulator to compute this sum.
5. Show theaverageof all the numbers in the list. (Be sure to carefully check the result!)
6. Ask the user to enter athreshold(a number). Write a function that takes a list and the threshold as parameters, and returns a new list that contains all values in the original list that aregreaterthan or equal to the threshold-- these divisions get awards for high sales! The new list may, of course, be empty.

Program Organization:

The program should be organized as a series of function definitions. The 'main' function should contain the user interface as well as code that "calls" the other functions and then shows the results to the user. Only the 'main' function should interact with the user. No other function should print anything; rather, each function "returns" a value.  Do not use any global variables.

Testing:

As always, be sure to test each result using representative data to make sure it is correct, and include comments showing documented test cases in your program.