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Corning Community College
CSCS2320 Data Structures
~~TOC~~
This section will document any updates applied to the project since original release:
In this project, we take a step up from our singly linked list implementation- just as the singly-linked list was a step up from the individual nodes as an organizing unit for nodes.
So what does this give us? An organizing unit for lists! I'm calling them “ListGroups” or “GroupOfLists”, and we'll also sneak in true linked list functionality, by adding an “after” pointer to the List struct.
We can now organize our lists with this new groupoflists struct (typedef'ed to Group for typing convenience).
#ifndef _GROUP_H #define _GROUP_H #include "list.h" // list relies on node to work struct groupoflists { List *first; // pointer to first list List *last; // pointer to last list }; typedef struct groupoflists Group; // because we deserve nice things Group *mkgroup(void); // create/allocate new Group Group *rmgroup(Group *); // clear/deallocate Group Group *linsert(Group *, List *, List *); // add list before given list Group *lappend(Group *, List *, List *); // add list after given list Group *lobtain(Group *, List **); // obtain/disconnect list from group long int ldisplay(Group *, long int); // display entire/aspects of list group long int lgetpos(Group *, List *); // retrieve position from given node List *lsetpos(Group *, long int); // seek to indicated node in list #endif
You should notice a striking similarity to the core list functionality (a first and a last pointer– only to Lists, and not Nodes), and the presence of Group manipulation and utility functions (appending, inserting, obtaining, displaying, getting/setting position, creating, and removing a group).
This project will test the level of your abstraction skills– for there isn't that much of a conceptual difference between the list functions and the group functions. The more you understand that, the easier this project will be.
In src/group/, you will find 7 new C files:
Take a look at the code there. These are the files that contain functions which will be compiled and archived into the group library (libgroup.a) we will be using in this and future projects.
Figure out what is going on, make sure you understand it.
In unit/group/, you will find the unit tests and verify scripts for the functions to be implementated in the group library.
These are complete runnable programs (when compiled, and linked against the group library, which is all handled for you by the Makefile system in place).
Of particular importance, I want you to take a close look at:
To assist you in verifying a correct implementation, a fully working implementation of the node library, list library (with new modifications), and group library should resemble the following:
Here is what you should get for all the functions completed in the group library:
lab46:~/src/data/sll4$ make check ====================================================== = Verifying Singly-Linked Group Functionality = ====================================================== [mkgroup] Total: 5, Matches: 5, Mismatches: 0 [rmgroup] Total: 3, Matches: 3, Mismatches: 0 [linsert] Total: 20, Matches: 20, Mismatches: 0 [lappend] Total: 20, Matches: 20, Mismatches: 0 [lobtain] Total: 15, Matches: 15, Mismatches: 0 [ldisplay] Total: 31, Matches: 31, Mismatches: 0 [lgetpos] Total: 14, Matches: 14, Mismatches: 0 [lsetpos] Total: 14, Matches: 14, Mismatches: 0 ====================================================== [RESULTS] Total: 122, Matches: 122, Mismatches: 0 ====================================================== lab46:~/src/data/sll4$
When you are done with the project and are ready to submit it, you simply run make submit:
lab46:~/src/data/PROJECT$ make submit ...
To be successful in this project, the following criteria must be met: