C Program To Implement Dictionary Using Hashing Algorithms May 2026

printf("=== Dictionary Implementation using Hashing in C ===\n\n");

free(old_buckets); To make the dictionary work with any data type, replace int value with void *value and store the size or use a union. 6.3 Thread Safety For multithreaded programs, add mutex locks per bucket (fine-grained locking) or a single global lock (coarse-grained but simpler):

display(dict);

While C lacks built-in dictionaries, mastering this implementation gives you complete control over performance and memory—something higher-level languages abstract away. Whether you're building a compiler symbol table, a database index, or a caching system, this hash table dictionary will serve you well.

int index = hash_function(key) % table->size; Chapter 4: Complete Implementation of the Dictionary Let's build the dictionary step by step. 4.1 Create and Initialize Dictionary // Create a new hash table HashTable* create_hash_table(int size) HashTable *table = (HashTable*)malloc(sizeof(HashTable)); if (!table) return NULL; table->size = size; table->count = 0; c program to implement dictionary using hashing algorithms

if (found) *found = 0; return -1; // Delete a key from the dictionary int delete_key(HashTable *table, const char *key) if (!table 4.5 Display the Dictionary // Display all key-value pairs (for debugging) void display(HashTable *table) if (!table) return; printf("\n=== Dictionary Contents (Total: %d entries) ===\n", table->count); for (int i = 0; i < table->size; i++) if (table->buckets[i]) printf("Bucket[%d]: ", i); KeyValuePair *current = table->buckets[i]; while (current) printf("(%s -> %d) ", current->key, current->value); current = current->next; printf("\n");

// Cleanup destroy_hash_table(dict);

return new_pair;