Password Validation in C++

#include <iostream>
#include <string>
#include <cctype> // Include the <cctype> header for character checks

bool isStrongPassword(const std::string& password) {
    // Check the length of the password
    if (password.length() < 8) {
        return false;
    }

    // Initialize flags for character types
    bool hasDigit = false;
    bool hasUpperCase = false;
    bool hasLowerCase = false;

    // Check each character in the password
    for (char ch : password) {
        if (std::isdigit(ch)) {
            hasDigit = true;
        } else if (std::isupper(ch)) {
            hasUpperCase = true;
        } else if (std::islower(ch)) {
            hasLowerCase = true;
        }
    }

    // Check if all required character types are present
    return hasDigit && hasUpperCase && hasLowerCase;
}

int main() {
    std::string password;

    // Input the password from the user
    std::cout << "Enter a password: ";
    std::cin >> password;

    // Validate the password
    if (isStrongPassword(password)) {
        std::cout << "Password is strong and valid." << std::endl;
    } else {
        std::cout << "Password is weak or invalid." << std::endl;
    }

    return 0;
}