• C Program To Implement Dictionary Using Hashing Algorithm In Excel

The way you 'Set' new entries to your list is buggered. You should not be swapping out the first entry for the new entry. The list should stream in logical order unless you have applied a sorting algorithm or callback mechanism.

1. Computer Programming. Wednesday, October 5, 2011. Write a C program to implement all the functions of a dictionary (ADT) using hashing Rejinpaul. 6:55 AM ADS JNTU /. Write a C program to implement all the functions of a dictionary (ADT) using hashing./ #include #include.
2. Write a C Program to implement hashing. Hashing is the function or routine used to assign the key values to the each entity in the database. Using hashing, We can easily access or search the values from database. In this program we used the open addressing hashing, also called as closed hashing. Read more about C Programming Language.

Get rid of the str* functions. Use memcmp instead. Cache the key length of the input as well as give the user a chance to define the length of the INPUTS.

Notice I changed your 'next' member to 'successor' which is altogether better english. As is, next could imply a verb or a noun which gives rise to much potential confusion. Same thing goes for that procedure with Set in its name. Use Put instead. Sets are another type of associative array. My version of 'Set' also allows the specification of a boolean overwrite, and returns a boolean status rather than void, which means we can set error codes for interested processes.

I've also done some more identifier changes:

C Program To Implement Dictionary Using Hashing Algorithm In Excel

For example, on my PC /usr/share/dict/words is intended to contain 479829 words (1 per line) but is read as 526065 words of which 418666 are unique and 107399 are duplicates. Dict.h - defines the dictionary facilities that must be provided by dict-tree.c or dict-hash.c for the spell-checking program to function correctly.

My version, (thanks to your contribution of course) Allows for binary keys and values by allowing the user to specify length of input. If the length given for an input is ZERO, then it is logically assumed that it MUST be a bona-fide char *, for which we CAN use strlen or some other inline byte scanner. Just to be sure it works out for other folks, I added compiler option: -fno-strict-aliasing. At this point since you have added a keyLength member to your entries... You can validate your keys by testing the key lengths FIRST, then if equal, perform a memcmp and check explicitly for ZERO return value. Saves much processing, and is absolutely imperative when supplying binary datum for keys and values.

For my next trick, I'm adding a logical order list, equal to the size of the allocated 'table' as you called it. In this ZERO Initialized unlinked offset list, I will store in SET OPERATION order, the offsets of the 'buckets' (or 'bins' as you called them), so that an enumeration call back, can be supplied with logical ordered lists, without having to muck around with searching algorithms, storing order properties on entries, or massive link dereferencing to enumerate the Hash Table Entries. The most immediate drawback to this approach, is that if a list is removed completely from the hash table, the entire array of offsets will need to be shifted to maintain logical order. Of course, since a user can't readily determine how to delete an entire list, this is a rare event. This process could be optimized by providing a varag function that takes a list of keys to delete, from there, its simply delete all targets and fill in the blanks.

OOPS, in the midst of all this self talk, I realized I overlooked the fact that I will indeed have to track the address of EACH new KVP to maintain order. Which, is not bad at all. When it comes time to destruct, its a single serial operation, AND, we can add a performance hit counter to each entry and add some automatic access tuning without getting all trussed up in the process.

You may also note, that with binary inputs... You could actually use this beast to implement a pseudo array that can have named properties. You also aren't held back by string encoding. Multiple encodings equates to multiple entries of course, so you'll have to settle for something or everything, which is much better than nothing!

Thanks for this great opportunity to stretch my legs. I'll come back later and post my repo. But I really do believe, if you are interested in this topic of computer science, as well as learning, and trying NEW things, the example code given is the best there is, because it IS NOT PERFECTED, but in its simplicity, it is PERFECT.