#include <iostream>
#include <cctype>
#include <cstring>
using namespace std;


int main()
{
        const int LENGTH = 101;
        char List[LENGTH];
        int Upper, Lower, Digit;

                                // Password criteria promoted to user:
        cout << "Please create your password. The password should meet the following criteria:\n"
                << "The password should be at least ten characters long.\n"
                << "The password should contain at least two uppercase and at least one lowercase letter.\n"
                << "The password should have at least one digit.\n\n";

        do                      // Password is entered and is verifed.
        {
                Upper = Lower = Digit = 0;

                cout << "Please enter the password: ";                                          // Initial password entry.
                cin.getline(List, LENGTH);

                for (int i = 0; i < strlen(List); i++)
                {

                         if (isupper(List[i]))                                                   // Password is checked for proper uppercase, lowercase, and digits.
                            Upper++;

                        if (islower(List[i]))
                            Lower++;

                        if (isdigit(List[i]))
                            Digit++;
                }           // Password Verification process.

                if (strlen(List) < 10)                                                          // If proper instructions are not met, you are then prompted to enter the password again.
                        cout << "Password is not at least ten characters long.\n";
                if (Upper == 0)
                        cout << "Password does not have at least two uppercase letters.\n";
                if (Lower == 0)
                        cout << "Password does not have at least one lowercase letter.\n";
                if (Digit == 0) "Password does not have at least one digit.\n";
        }
        while (Upper == 0 || Lower == 0 || Digit == 0 || strlen(List) < 10);


        cout << "Password has now been verified. Your password is: " << List << endl;           // Once password is correctly entered the password is displayed for the user to see.

        return 0;
}