206 Lab G - Struct and Dynamic memory

Lab G Software Systems McGill Vybihal Dynamic Memory Page 1 of 2 Dynamic Memory Lab G TA teaching instructions can be found at the end of this document. The labs, for this course, are designed to be completed on your own at home or in the 3 rd floor Trottier labs. These labs are not graded. You do not hand in these labs. If you prefer to work on a lab with your TA tutorial group, then check the schedule for your TA ’s tutorial session. You will find this schedule in our MyCourses page under Content/Course Information/TA Information. Since the university has limited lab space, your TA might ask you to bring your laptop and work in a classroom instead of a lab. This lab is about programming with struct / union and malloc / calloc. Some labs will have a question zero. These questions will not be covered by the TA during the tutorial. It is extra content meant for you to do on your own. QUESTION ZERO: Optional problem If you like, review these online resources: 1. Struct and union: https://www.programiz.com/c-programming/c-structure-examples 2. Dynamic memory: https://www.programiz.com/c-programming/c-dynamic-memory-allocation QUESTION ONE: Struct and Union Given the following structure: struct BANK_ACCOUNT { char type; // ‘S’=savings, ‘C’=checking double balance; union ACCOUNT_SPECIFIC { double charge; // for withdrawal from savings accounts int credit_score; // for checking account } specific; }; Do the following: a) Create a single source file called bank.c and put into that file the above structure and a main() function. b) Create a local array, called accounts, in main(), of 100 cells, type BANK_ACCOUNT. Use this pattern: struct BANK_ACCOUNT accounts[100]; c) Create a local integer variable, called nextSpot , and initialize it to zero. This variable will be used to track where in the array accounts the next account will be created. In other words, to the left of nextSpot are array cells with account information. At nextSpot and to the right, those cells are not used. d) Prompt the user for the number of accounts they would like to create. Store that in an integer variable called newAccounts .