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C++ Programming
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build a software for Back2School to enable their online business. you will be writing a program that will allow customers to order products “online” and get them delivered to their designated address.

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Back2School is a family-owned store that has been selling school supplies for the last ten years. The owner wants to expand its business to cater to possible customers who may not have the chance to visit their store, so they wish to make their business online.

You have been offered an opportunity to build a software for Back2School to enable their online business. Essentially, you will be writing a program that will allow customers to order products “online” and get them delivered to their designated address. The program accepts as input a purchase order (PO), which is simply a shopping list containing the item codes and quantity of each item for purchase. The program then generates an invoice with the pricing and delivery costs.

The Back2School management is keen to make sure that you will be able to deliver the program by the deadline; as they wish to start the online business as soon as possible. You, as the developer of the program, are required to deliver the program in milestones. This document describes the first milestone.

 

First Milestone: Item Pricing Lookup

 

Your first milestone is a program that will allow items to be queried from the inventory. Specifically, there are three queries that your program will accept:

 

  • display all categories;

  • display all items within a given one-character category code; and

  • display a specific item given the unique product code

 

At present, there are only four categories; and the number of items per category is also provided by the management. The Back2School management has provided all the details of these on the five tables below. Please be aware that in the second milestone, the management may add more categories and items per category/

Essentially, in this milestone, you are to write your program so that information about these categories and the items are kept within the code itself; and you are to use the appropriate C program constructs (selection/conditional or iterative constructs) so that the queries can be performed.

 

Table 1. Item Categories for first milestone

Category Code

Description on the program

Detailed description (not to be put into the program)

W

Writing Instruments

This includes pens and pencils

P

Papers

This include different sizes of bond papers, yellow pads, oslo papers and colored papers

B

Bags

This includes backpacks and tote bags

E

Envelopes

This includes different sizes (long and short) of brown envelopes and folders

 

Table 2. Items in category W (Writing instruments)

Item Code

Description

Unit Price (in PHP)

Weight (in kg)

1001

Ballpoint pen

10.00

0.020

1002

Rollerball pen

20.00

0.030

1003

Number 1 pencil

12.00

0.010

1004

Number 2 pencil

12.00

0.010

1005

Number 3 pencil

12.00

0.010

1006

Mechanical pencil

50.00

0.050

1007

Fountain pen

100.00

0.100

 

Table 3. Items in category P (Papers)

Item Code

Description

Unit Price (in PHP)

Weight (in kg)

2001

Short-sized Bond Papers (1 ream)

200.00

0.800

2002

Legal-sized Bond Papers (1 ream)

220.00

0.820

2003

A4-sized Bond Papers (1 ream)

250.00

0.800

2004

Yellow Pads (100 sheets)

45.00

0.450

2005

White Pads (100 sheets)

35.00

0.350

2006

Legal-sized Oslo Paper (20 sheets)

50.00

0.550

2007

Colored Papers (20 sheets)

20.00

0.200

 

Table 4. Items in Category B (Bags)

Item Code

Description

Unit Price (in PHP)

Weight (in kg)

3001

Back pack

250.00

0.400

3002

Tote bag

120.00

0.300

3003

Gym bag

380.00

0.500

3004

Messenger bag

420.00

0.750

 

Table 5. Items in Category E (Envelopes)

Item Code

Description

Unit Price

(in PHP)

Weight (in kg)

4001

Short-sized Brown Envelopes (10 pcs)

50.00

0.020

4002

Legal-sized Brown Envelopes (10 pcs)

80.00

0.030

4003

Short-sized Plastic Envelopes (10 pcs)

120.00

0.500

4004

Legal-sized Plastic Envelopes (10 pcs)

140.00

0.600

4005

Short-sized Folder (10 pcs)

80.00

0.600

4006

Legal-sized Folder (10 pcs)

120.00

0.700

 

Presented below are sample runs showing what your program should achieve to complete the first milestone. The Back2School management will review your work and if they are satisfied with your work, they will send you the agreed-upon development fee. The development fee is highly dependent on the quality of the work you have done and if your program achieves the desired functions, including handling of invalid user inputs.

For the purpose of the course, the CCPROG1 requirement, the development fee will be translated in a form of a grade and feedback for improvements in preparation for the next milestone requirement.

Please carefully study the example runs of the first milestone program below. The user input is printed in boldface and underlined. For sample run #1, the first query is demonstrated, and the only user input is 1. The program then prints out the four categories, displaying the one-letter code and the short description of each category (this is from column 2 of Table 1 above). Note that the information on column 3 for Table 1 is not stored in the program.

Sample Run #1.

On startup, the program displays the three options for query. The only acceptable choices are 1, 2, or 3. If the user has entered another input value apart from the three choices, the program is to display an error message: “Invalid category” and it exits afterwards with “Good bye!”.

Category

W

Description

Writing instruments

Item Code Range

1001-1007

P

Paper

2001-2007

B

Bags

3001-3004

E

 

Good bye!

Envelopes

4001-4006

 

 

Sample Run #2.

This sample run demonstrates what your program will display for the second query. This requires two user inputs: 2 which means the second query followed by exactly one of four category codes. In this example, W was the user input. Note that there are only four valid choices for the second input: W, P, B, or E. If the user has input any other character, the program is to display this error message: “Invalid category”.

Item Code

Description

Unit Price

Unit Weight

1001

Ballpoint pen

10.00

0.020

1002

Rollerball pen

20.00

0.030

1003

Number 1 pencil

12.00

0.010

1004

Number 2 pencil

12.00

0.010

1005

Number 3 pencil

12.00

0.010

1006

Mechanical pencil

50.00

0.050

1007

 

Good bye!

Fountain pen

100.00

0.100

Sample Run #3:

What you see below is the program behavior and output for the third query. In this case, the user enters 3 and then enters the unique item code, in this case, 3004 was entered. Your program has to validate the item code if it exists on the Table 2, 3, 4 and 5 above.

Item Code

Description

Unit Price

Unit Weight

3004

 

Good bye!

Messenger bag

420.00

0.750

 

 

Additional programming notes:

 

  1. Carefully consider how to design your program to minimize repeating the data stored. For example, it should be possible to write your code so that the item descriptions like “Messenger bag” appear only once within your program. Hint: consider using functions and

  2. Consider writing a single function to implement query #3, that is, given the item code, it simply displays the item details, i.e., item code, description, unit price and unit weight. This will make it easier to implement query #2; essentially using a loop to display each item in a given category, like W.

  3. It is also worthwhile to design the program so that it is relatively easy to add more

categories and add more items per category.

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