std::hash

#include <iostream>
#include <functional>

int main() {
    std::string str = "Hello, World!";

    // Step 1: Create an instance of std::hash for the appropriate type (in this case, std::string).
    std::hash<std::string> hasher;

    // Step 2: Use the hash function to compute the hash value for the given input.
    size_t hashValue = hasher(str);

    // Step 3: Output the computed hash value.
    std::cout << "Hash value for \"" << str << "\": " << hashValue << std::endl;

    return 0;
}