How to Create a Password Generator in C++

#include <iostream>
#include <string>
#include <algorithm>
#include <random>

std::string generate_password(int length = 16) {
    std::string seed = string("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ") + string("0123456789") + string("!@#$%^&*()_+=-{}[]\\|:;<>,.?/");

    std::string password_string = seed;
    std::shuffle(password_string.begin(), password_string.end(), std::mt19937{std::random_device{}()});
    return password_string.substr(0, length);
}

int main() {
    std::cout << generate_password() << std::endl;
    std::cout << generate_password(28) << std::endl;
    return 0;
}