Question

Topics: User Defined Functions and MATLAB Conditionals

A online retailer has hired you to write a program to calculate the total cost of a customer's order. First, the retailer must enter the name and the price per unit for two different candies. Then, the customer is allowed to order as many units of each of the two candies as they would like. Lastly, an invoice (report) is generated (displayed to the screen) under the following rules:

All units up to and including the 20th are sold at full price.

All unit in excess of 20 are sold at a 10% discount.

For each candy there must be a separate line indicating:

The candy's name

The candy's full unit price

How many units are being sold at full unit price

The resulting subtotal

And if applicable, another line indicating:

The candy's name

The candy's discounted unit price

How many units are being sold at discounted unit price

The resulting subtotal

There must be a line indicating the total of the order.

There must be a line indicating the sales tax on the total of the order (based on a 5% sales tax)

There must be a line indicating the grand total of the order.

Finish the following MATLAB function and write a MATLAB Script that (uses that function) to satisfy the above description.

function [ fpUnits, fpSubtotal, disUnits, disSubtotal ] = proccessCandy( unitsSold, unitPrice, discountThr, discount )

%proccessCandy Compute values for each candy

%{

INPUT:

-----

unitsSold - Total number of candy units being sold

unitPrice - Full price of each unit

discountThr - The number of units that must be exceeded

                before applying discount

discount - The discount rate to be applied eg (15% -> 0.15)

OUTPUT:

------

fpUnits - How many units being sold at full price

disUnits - How many units being sold at discounted price

fpSubtotal - Total cost of full priced units

disSubtotal - Total cost of discounted priced units

%}

% your formulas and logic here

end

Outline:

1.) Create a MATLAB Function .m file – named processCandy.m

2.) Copy the skeleton function given

3.) Finish the function by assigning all of the output variables correctly

4.) Create a MATLAB Script .m file – named Program04.m

5.) Write the necessary MATLAB commands to prompt for and read into variables all of the Retailer's and Customer's input data

6.) Call your processCandy function to compute the results for the first candy

7.) Format and display to the screen, the output report for this candy

8.) Call your processCandy function to compute the results for the second candy

9.) Format and display to the screen, the output report for this candy

10.) Format and display to the screen, the total order cost, total order tax and grand-total

Notes(s):

You will need to use (in your script) the

= input(, 's');

version of input to read in and assign the non-evaluated string Candy names that the user types.

You will need to use (in your script) the

= input();

version of input to read in and assign the Numeric quantities that the user types.

Your function must not display anything to the screen, nor get any user input.

Sample Run(s):

Welcome to the CS240 Online Store

---------------------------------

Retailer ...................

Please enter the name of first Candy: Snickers

Please enter the price (per unit) of Snickers $1

Please enter the name of second Candy: Mike-N-Ikes

Please enter the price (per unit) of Mike-N-Ikes $2

Consumer .....................

Enter number of units of Snickers to purchase: 30

Enter number of units of Mike-N-Ikes to purchase: 20

Order Summary ...

Candy              Units   Price/Unit       Cost

----------------------------------------------

Snickers          20        $1.00               $20.00

Mike-N-Ikes   20        $2.00               $40.00

Mike-N-Ikes   10        $1.80               $18.00

----------------------------------------------

Total order cost $78.00

Total order tax $3.90

Order Grand-total $81.90

***For only two candies, but the program can work for multiple candies***

Answer 1

% Function to caculate subtotal, for each candy

function [fpUnits, fpSubtotal, disUnits, disSubtotal] = proccessCandy(unitsSold, unitPrice, discountThr, discount)

    disUnits = 0;
    fbSubtotal = 0.0;
    disSubtotal = 0.0;
    fpUnits = unitsSold;
  
    if (unitsSold > discountThr)
        disUnits = unitsSold - discountThr;    
        fpUnits = discountThr;
    end

    fpSubtotal = (fpUnits * unitPrice);
    discountedPrice = unitPrice - (unitPrice * discount);
    disSubtotal = (disUnits * discountedPrice);
end

% Candie one information
candieOneName = input('Please enter the name of first Candy: ', 's');
fprintf('Please enter the price (per unit) of %s : ', candieOneName);
candieOneCost = input('');

% Candie two information
candieTwoName = input('Please enter the name of second Candy: ', 's');
fprintf('Please enter the price (per unit) of %s : ', candieTwoName);
candieTwoCost = input('');

% discountThr = input('Enter discount threshold units : ','d');
% discount = input('Enter discount % (eg., 10% -> 0.10 ): ','d');

% Customer sales
fprintf('Enter number of units of %s to purchase : ', candieOneName);
candieOneUnits = input('');
fprintf('Enter number of units of %s to purchase : ', candieTwoName);
candieTwoUnits = input('');

% Computing required total values
[fpUnits1, fpSubtotal1, disUnits1, disSubtotal1] = proccessCandy(candieOneUnits, candieOneCost, 20, 0.10);
[fpUnits2, fpSubtotal2, disUnits2, disSubtotal2] = proccessCandy(candieTwoUnits, candieTwoCost, 20, 0.10);

subTotal = (fpSubtotal1 + disSubtotal1) + (fpSubtotal2 + disSubtotal2);
taxes = subTotal * 0.05;
grandTotal = subTotal + taxes;

fprintf('\n----------------------------------------------------------------\n');
fprintf('%-15s %-10s %-12s %-10s\n', 'Candy', 'Units', 'Price/Unit', 'Cost');
fprintf('%-15s %-10d %-12d %-10d\n', candieOneName, candieOneUnits, candieOneCost, fpSubtotal1 + disSubtotal1);
fprintf('%-15s %-10d %-12d %-10d\n', candieTwoName, candieTwoUnits, candieTwoCost, fpSubtotal2 + disSubtotal2);
fprintf('----------------------------------------------------------------\n');
fprintf('%-15s=\t%d\n%-15s=\t%d\n%-15s=\t%d\n', 'subTotal', subTotal, 'Taxes', taxes, 'Grand Total',grandTotal);