Description
In this workshop, you merge two lists and use a smart pointer to ensure that memory is deallocated in the possible handling of an exception. LEARNING OUTCOMES Upon successful completion of this workshop, you will have demonstrated the abilities to • create a program component of quadratic complexity • use a smart pointer to move an object SUBMISSION POLICY The in-lab section is to be completed during your assigned lab section. It is to be completed and submitted by the end of the workshop period. If you attend the lab period and cannot complete the in-lab portion of the workshop during that period, ask your instructor for permission to complete the in-lab portion after the period. If you do not attend the workshop, you can submit the in-lab section along with your at-home section (see penalties below). The at-home portion of the lab is due on the day that is four days after your scheduled in-lab workshop (23:59:59) (even if that day is a holiday). All your work (all the files you create or modify) must contain your name, Seneca email and student number. You are responsible to back up your work regularly. Late Submission Penalties: • In-lab portion submitted late, with at-home portion: 0 for in-lab. Maximum of 7/10 for the entire workshop. • If any of in-lab, at-home or reflection portions is missing, the mark for the workshop will be 0/10. GENERAL SPECIFICATIONS This workshop merges a description list with a price list to create a user-friendly price list. The modules that constitute this workshop are listed below along with their file names 1. Element module: Element.h (incomplete) 2. List module: List.h (incomplete) 3. Utilities module: Utilities.h (supplied) Utilities.cpp (incomplete) 4. Main module: w8.cpp (supplied) The data files are at • Prices.dat 067 0.99 4068 0.67 4039 1.99 4056 2.49 • Descriptions.dat 4662 tomatoes 4039 cucumbers 4056 brocoli 4067 lemons 4068 oranges • BadPrices.dat 4067 0.99 4068 0.67 4039 1.99 4056 -2.49 Element Module The Element module holds product code, price and description information. • The Description structure holds product code and user-friendly description. • The Price structure holds product code and current price. • The Product structure holds user-friendly description and product price. List Module The List module defines a class that retrieves a list of records stored in a text file, holds the elements in an STL vector, provides access to them by index and displays them to an output stream. SPECIFICATIONS – IN LAB This part of the workshop is a raw pointer solution. The output from your executable running Visual Studio with the following command line argument should look like Command Line : C:\Users\…\Debug\in_lab.exe Descriptions.dat BadPrices.dat Prices.dat Code Description 4662 tomatoes 4039 cucumbers 4056 brocoli 4067 lemons 4068 oranges ******************************************** * Good Prices ******************************************** Code Price 4067 0.99 4068 0.67 4039 1.99 4056 2.49 ******************************************** * Bad Prices ******************************************** Code Price 4067 0.99 4068 0.67 4039 1.99 4056 -2.49 ******************************************** * Merging bad prices using Raw Pointers ******************************************** C [1] CC [2] from [1] ~D [1] C [3] ~D [2] ERROR: *** Negative prices are invalid *** NOTE: An exception occurred while creating the list of products! You should notice that not all objects are deleted. ******************************************** * Merging good prices using Raw Pointers ******************************************** Description Price cucumbers 1.99 brocoli 2.49 lemons 0.99 oranges 0.67 The input for testing your solution is stored in the three user-prepared files listed above. Your tasks for this part of the workshop are: 1. Add a validate function to the Element module 2. Add an operator += overload to the List module using raw pointer syntax 3. Complete the merge function in the Utilities module using raw pointer syntax validate Function Add a validate function to your Product type. Your function reports an exception if the object’s price is negative. Your function receives nothing and returns nothing. Operator += overload Add an operator += overload to your List template. Your function receives the address of an object to be stored in the List container and moves the object into that container. Your overload returns nothing. mergeRaw Function Your function compares the elements in the two received lists for common product codes and builds the user-friendly list from the matching pairs. For each successful comparison, your function allocates dynamic memory of Product type using that description and the price. Your function then validates the Product object and adds it to its list. Your function returns a copy of this list. In-Lab Submission (30%) To test and demonstrate execution of your program use the same data as shown in the output example above. Upload your source code to your matrix account. Compile and run your code using the latest version of the gcc compiler and make sure that everything works properly. Then, run the following command from your account: (replace profname.proflastname with your professor’s Seneca userid) ~profname.proflastname/submit 345XXX_w8_lab and follow the instructions. Replace XXX with the section letter(s) specified by your instructor. SPECIFICATIONS – AT HOME The output from your executable running Visual Studio with the following command line argument should look like Command Line : C:\Users\…\Debug\at_home.exe Descriptions.dat BadPrices.dat Prices.dat Code Description 4662 tomatoes 4039 cucumbers 4056 brocoli 4067 lemons 4068 oranges ******************************************** * Good Prices ******************************************** Code Price 4067 0.99 4068 0.67 4039 1.99 4056 2.49 ******************************************** * Bad Prices ******************************************** Code Price 4067 0.99 4068 0.67 4039 1.99 4056 -2.49 ******************************************** * Merging bad prices using Raw Pointers ******************************************** C [1] CC [2] from [1] ~D [1] C [3] ~D [2] ERROR: *** Negative prices are invalid *** NOTE: An exception occurred while creating the list of products! You should notice that not all objects are deleted. ******************************************** * Merging bad prices using Smart Pointers ******************************************** C [4] CC [5] from [4] ~D [4] C [6] ~D [6] ~D [5] ERROR: *** Negative prices are invalid *** NOTE: An exception occurred while creating the list of products! You should notice that ALL objects are deleted. ******************************************** * Merging good prices using Raw Pointers ******************************************** Description Price cucumbers 1.99 brocoli 2.49 lemons 0.99 oranges 0.67 ******************************************** * Merging good prices using Smart Pointers ******************************************** Description Price cucumbers 1.99 brocoli 2.49 lemons 0.99 oranges 0.67 The input for testing your solution is stored in the three user-prepared files listed above. Your tasks for this part of the workshop are: 1. Add an operator += overload to the List module using smart pointer syntax 2. Complete the merge function in the Utilities module using smart pointer syntax Reflection Study your final solution, reread the related parts of the course notes, and make sure that you have understood the concepts covered by this workshop. Take your time. Explain in your own words what you have learned in completing this workshop. Include in your explanation but do not limit it to the following points (40%): • The advantage that smart pointer syntax provides. • List the difference between raw and smart pointer syntax in your solution. To avoid deductions, refer to code in your solution as examples to support your explanations. Include all corrections to the Quiz(zes) you have received (30%). At-Home Submission (70%) To test and demonstrate execution of your program use the same data as shown in the output example above. Upload your source code to your matrix account. Compile and run your code using the latest version of the gcc compiler and make sure that everything works properly. Then, run the following command from your account: (replace profname.proflastname with your professor’s Seneca userid) ~profname.proflastname/submit 345XXX_w8_home and follow the instructions. Replace XXX with the section letter(s) specified by your instructor.