Simple User Login Program

[mccor013]

Hello all, this is my first post. I am currently reading a beginner book to learn C++.
The code below is my latest attempt to solve a practice question from the book.
Keep in mind I am less than a week into C++ and have minimal knowledge of variables, conditionals, loops, and functions.

I was simply hoping for a review of my code. Any tips would be helpful. Is my logic correct? etc.
Thanks all!

Code Description:
-This program asks the user to enter a user name and password (which I have already pre-defined in the code).
-It then checks the user's input in the if-else-if statements.
-If the login condition is true, it will print a welcome message to the user.
-Otherwise it will tell the user the entry is invalid and allows them to try 4 more times. (5 in total)
-Also, the loginAttempt loop counter is incremented up by 1.
-All of these if-else-if statements are nested in a while loop which checks the loginAttempt condition.

-When the loop breaks, the program will check to see if the variable loginAttempt == 5, if its true it will tell the user they have tried to login too many times and the program will terminate.

-If the login was successful the loop will break and ignore the the previous condition I just mentioned and print a thank you message for logging in.

#include <iostream>
using namespace std;

int main ()
{
    string userName;
    string userPassword;
    int loginAttempt = 0;

    while (loginAttempt < 5)
    {
        cout << "Please enter your user name: ";
        cin >> userName;
        cout << "Please enter your user password: ";
        cin >> userPassword;

        if (userName == "greg" && userPassword == "dunn")
        {
            cout << "Welcome Greg!\n";
            break;
        }
        else if (userName == "patrick" && userPassword == "dunn")
        {
            cout << "Welcome Patrick!\n";
            break;
        }
        else
        {
            cout << "Invalid login attempt. Please try again.\n" << '\n';
            loginAttempt++;
        }
    }
    if (loginAttempt == 5)
    {
            cout << "Too many login attempts! The program will now terminate.";
            return 0;
    }

    cout << "Thank you for logging in.\n";
}

[rmxhaha]

I think it's correct

perhaps add return 0; after cout << "Thank you for logging in.\n";

or

if( loginAttempt == 5 ){
    cout << "Too many login attempts! The program will now terminate.";
}
else {
   cout << "Too many login attempts! The program will now terminate.";
}
return 0;

it doesn't matter much but it still matter sometimes

[Mats]

You need to #include <string> to use strings.

[mccor013]

@Mats - You are correct! Thanks, I forgot to #include <string>

@rmxhaha - Thanks, ill rework that bit of code to clean it up.

Thanks all, trying to wrap my head around the structure of these concepts. Thanks for taking a look at it.

[mccor013]

@ Mats - Question, I compiled and ran the program without the <string> header file and it did not complain. It actually ran as normal with no issues. How am I able to declare a string variable without that header file?

I am using Code::Blocks to code, compile, and run my programs.

*UPDATE* I actually found out that string resides in the std namspace.
So even though I did not #include <string> it is still valid.

I have been reading results may vary from compiler to compiler.

Is it good practice to just #include <string> so no unexpected errors might occur??