THIRD TIME POSTING THIS write a c program that will prompt a

THIRD TIME POSTING THIS.

write a c++ program that will prompt a user to enter a username and password. Validate the user’s login before allow the use to advance.

You must start out by having a datafile that has a list of ten (10) usernames and passwords.

   Possible login error messages for username:

1. Username not found

Possible login error messages for password:

1. Password not found

1. Password must contain eight (8) or more characters

2. Password must contain a special character

3. Password cannot have blank spaces

4. Password must have at least two numbers

5. Password must have at least one uppercase letter

The program should prompt a user with a login screen. (Example)

Enter Login ID: XXXXXXXXXX

(if login is not found, display error message and loop until correct of the user chooses to exit.)

Then

   Enter Password: XXXXXXXXXXXXX

   (If the password not found, display error message and loop twice. If not successful after two attempts, write a login attempt log to a log file named “ERROR_LOG”.

If login attempt is successful, prompt the user with the following screen:

1. Add a User & Password

2. Update user password

3. Exit

Enter your choice: __

*Make use of the cctype header

Solution

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

//function prototype for testing.
bool PasswordClient(char [], int);
int main()
{
//allocate memory
char *passwrd;  
int lnj;   //assure requested lnj and pass lnj are the same
int nochars;   //hold number of characters for passwrd

//get Password from user
cout << \"Please enter how many characters you would like your\ password to be.\";
cout << \" Your passwrd must be at least 6 characters long.\" << endl;
cin >> nochars;

while (nochars < 6)
{
cout << \"Please enter a passwrd lnj of at least 6 characters.\" << endl;
cin >> nochars;
}

passwrd = new char[nochars];

cout << \"Please enter a passwrd that contains at least one uppercase letter, \";
cout << \"one\ lowercase letter, and at least one digit.\" << endl;

cin >> passwrd;

lnj = strlen(passwrd);

while (lnj != nochars)
{
cout << \"Your passwrd is not the size you requested. \";
cout << \"Please re-enter your passwrd.\" << endl;
cin >> passwrd;
lnj = strlen(passwrd);
}

if (PasswordClient(passwrd, nochars))
cout << \"Your passwrd is valid.\" << endl;
else
{
cout << \"Your passwrd is not valid. \";
cout << \"Please refer to the above warning message.\" << endl;
}
return 0;
}

bool PasswordClient(char pass[], int nochars)
{
int count = 0;

while (pass[count] != islower && pass[count] != \'\\0\')
count++;

if (!islower(pass[count]))
return false;

return true;
}