C Program To Implement Dictionary Using Hashing Algorithms

Quick Way to Implement Dictionary in C. Section 6.6 of The C Programming Language presents a simple dictionary. I think use lookup table and hashing key for this. Hash Tables - Cprogramming. Hash tables are an efficient implementation of a keyed array data structure. If you're working. C++, you can take advantage of the STL map. The source code file for the dictionary implementation which contains the logic and main implementation of the dictionary library. This model is backed using a data structure commonly known as a 'trie', often referred to as a 'digital tree' or a 'prefix tree'. C program to implement Depth First Search(DFS).Depth First Search is an algorithm used to search the Tree or Graph.DFS search starts from root node then traversal into left child node and continues, if item found it stops other wise it continues.

C Program To Implement Dictionary Using Hashing Algorithms Online

Learn how to create Hash Table using Separate Chaining in C Programming Language. The separate chaining hash table implementation makes use of Linked List in C Programming. There are different hashing algorithms such as Bucket Hashing, Linear Probing, Separate Chaining, etc.

Hash tables offers finding the element in less key comparisons, making the search operation to execute in a Constant Time. Therefore, the search time for the element is independent of the number of records.

Separate Chaining Concept

In separate chaining implementation of hash tables, linked lists are used for elements that have the same hash address. The hash tables in this scenario does not include the actual keys and records. It contains only an array of pointers where pointer points to a linked list.

All the elements having the same hash address will be stored in a separate linked list and the starting address of that particular linked list will be stored in the index of the hash table. In the chaining method, the comparisons are done only with the keys that have the same hash values.

The disadvantage of Separate Chaining is that it needs an extra space for storing pointers which is dependent on the table size and the records.

Note: This code For Hash Table Implementation in C Programming using Separate Chaining is developed using gEdit Editor and compiled using GCC in Linux Ubuntu Operating System.

C Program To Implement Dictionary Using Hashing Algorithms

C Program For Hash Table using Separate Chaining and Linked List

Dictionary

Dictionary
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#include<stdlib.h>
#define MAX 20
structEmployee
intemployee_id;
intemployee_age;
{
structRecord *link;
voidinsert(structEmployee employee_record,structRecord *hash_table[]);
intsearch_element(intkey,structRecord *hash_table[]);
voidremove_record(intkey,structRecord *hash_table[]);
inthash_function(intkey);
intmain()
structRecord *hash_table[MAX];
intcount,key,option;
{
}
{
printf('2. Search for a Recordn');
printf('4. Show Hash Tablen');
printf('Enter your optionn');
switch(option)
case1:
printf('Employee ID:t');
printf('Employee Name:t');
printf('Employee Age:t');
insert(employee_record,hash_table);
case2:
scanf('%d',&key);
if(count-1)
printf('Element Not Foundn');
else
printf('Element Found in Chain:t%dn',count);
break;
printf('Enter the element to delete:t');
remove_record(key,hash_table);
case4:
break;
exit(1);
}
}
voidinsert(structEmployee employee_record,structRecord *hash_table[])
intkey,h;
key=employee_record.employee_id;
{
return;
h=hash_function(key);
temp->data=employee_record;
hash_table[h]=temp;
{
structRecord *ptr;
{
if(hash_table[count]!=NULL)
ptr=hash_table[count];
{
printf('%d %s %dt',ptr->data.employee_id,ptr->data.employee_name,ptr->data.employee_age);
}
}
}
intsearch_element(intkey,structRecord *hash_table[])
inth;
h=hash_function(key);
while(ptr!=NULL)
if(ptr->data.employee_idkey)
returnh;
ptr=ptr->link;
return-1;
voidremove_record(intkey,structRecord *hash_table[])
inth;
h=hash_function(key);
{
return;
if(hash_table[h]->data.employee_idkey)
temp=hash_table[h];
free(temp);
}
while(ptr->link!=NULL)
if(ptr->link->data.employee_idkey)
temp=ptr->link;
free(temp);
}
}
}
inthash_function(intkey)
return(key%MAX);

Output

How To Implement Dictionary In Java

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