POS System

Thor

Thor

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Hi guys,

I want to start learning programming and I though of a nice test project for me to learn hands on would be a POS system.

I have a few questions thou:

Number one what would be the ideal language in this case? I must admit I am biased considering Java...?

Number two if I want to create a user login what language besides java would be best to execute something like:

Code: 
  Bool Check _User (User ID, Password)
{

Check if user ID exist in the database.

If valid user ID then

	Get the corresponding password from database and decrypt it.

	If (Password_entered = Decripted_password_from_database) then

		Find the type of user.

		Based on the user type, enable the access to the different 
modules.

Enter the system.
	Else
		Display_message (‘Invalid User’).

		Check the count of wrong entry of user ID / password.

		If ( No. of times > 5 )
			Lock the user ID.
		Else
			Increase the count for wrong user ID.
		End if
	End If
End If

}
 
I am total noob dude like if I start to learn a language now I want it to be capable of doing everything :) So yes you are going to get a shiat load of ubernoob questions from me in this thread and i apologize in advance.
 
Thor187 said:
I am total noob dude like if I start to learn a language now I want it to be capable of doing everything :) So yes you are going to get a shiat load of ubernoob questions from me in this thread and i apologize in advance.
Click to expand...

Rather do this.

Go to youtube. Get a java tutorial series. Follow it. Keep following it. Do what they tell you to do.

Don't do this.

Don't just start with a random project to try and code it, you won't get anywhere and won't learn the basics properly.
 
faniedry said:
Rather do this.

Go to youtube. Get a java tutorial series. Follow it. Keep following it. Do what they tell you to do.

Don't do this.

Don't just start with a random project to try and code it, you won't get anywhere and won't learn the basics properly.
Click to expand...

Valid point just thought a hands on project would be better than countless hours of watching videos.

I can do HTML like boss thou, but never really ventured into programing.


Okay cool I will follow some java tutorials.


Java in general is it worth learning ?
 
Thor187 said:
Valid point just thought a hands on project would be better than countless hours of watching videos.

I can do HTML like boss thou, but never really ventured into programing.


Okay cool I will follow some java tutorials.


Java in general is it worth learning ?
Click to expand...

Yes. Absolutely worth it. Like I say, once you get to grips how everything fits together, you should be able to easily jump into something like android development etc.

Don't just watch the videos, do the exercises that they tell you to do.
 
You cant just start coding a system once you know a language. You will need a detailed design and technical design so you know what you are trying to achieve, and to see if requirements are being achieved. Read up on the basics of the SDLC.
 
Drifter said:
You cant just start coding a system once you know a language. You will need a detailed design and technical design so you know what you are trying to achieve, and to see if requirements are being achieved. Read up on the basics of the SDLC.
Click to expand...

That part I have done :)
 
Java? /pukes
Rather learn C# and use MVA it's way better than any YouTube video.
 
Thor187 said:
I know C# is ideal, but I am uber noob and afraid c wil be too daunting ? What is MVA ?
Click to expand...
Microsoft Virtual Academy, basically learn mostly anything MS related and some other stuff.

If you do C# you can easily jump to Java or anything after that.
 
Thor187 said:
Code: 
  Bool Check _User (User ID, Password)
{

Check if user ID exist in the database.

If valid user ID then

	[B]Get the corresponding password from database and decrypt it.[/B]

	[B]If (Password_entered = Decripted_password_from_database) then[/B]

		Find the type of user.

		Based on the user type, enable the access to the different 
modules.

Enter the system.
	Else
		Display_message (‘Invalid User’).

		Check the count of wrong entry of user ID / password.

		If ( No. of times > 5 )
			Lock the user ID.
		Else
			Increase the count for wrong user ID.
		End if
	End If
End If

}
Click to expand...

What ever you decide to go with, just don't do that... Whatever you do, don't do that...
Rather use a 1-way hashing algorithm (SHA256 is probably best) to store the password in the database.
Then when a user logs in, run the same hashing algorithm and check the result against the database.
That way the password can never be decrypted.
Also give some consideration to salting the password with the username and possible another value to ensure that even if 2 users use the same password, this is not immediately obvious when looking at the table.

I would really recommend .NET though. It's a lot easier to learn initially.
 
me_ said:
What ever you decide to go with, just don't do that... Whatever you do, don't do that...
Rather use a 1-way hashing algorithm (SHA256 is probably best) to store the password in the database.
Then when a user logs in, run the same hashing algorithm and check the result against the database.
That way the password can never be decrypted.
Also give some consideration to salting the password with the username and possible another value to ensure that even if 2 users use the same password, this is not immediately obvious when looking at the table.

I would really recommend .NET though. It's a lot easier to learn initially.
Click to expand...

Thank you so much for that advice, best practises will be something I have to read up about
 
So many thanks you's in this thread. I appreciate the nodge in the right direction guys.
 
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