What is hashing complexity in C++?

What is hashing complexity in C++?

Hashing complexity refers to the efficiency of hash functions in terms of time and space. In C++, it often involves analyzing how quickly a hash function can compute a hash value and how well it distributes keys in a hash table.

Why is hashing complexity important?

Hashing complexity is crucial because it affects the performance of data retrieval in hash tables. A good hash function minimizes collisions, leading to faster access times.

Can you give an example of a hash function in C++?

Sure! Here's a simple example of a hash function using the std::hash in C++:

#include <iostream>
#include <functional>

int main() {
    std::hash<std::string> hash_fn;
    std::string key = "example";
    size_t hash_value = hash_fn(key);
    std::cout << "Hash value: " << hash_value << std::endl;
    return 0;
}