How can I create a random number generator protected by password and user name?

[Epsilonn]

I attached a VI that is a random number generator. I just want to be prompted for user name/password when I start this generator. There should be three user names and passwords found in three different txt files. I would like to know how to link the user/password code to the number generator code and how to make the program to know that there are three txt files in my computer with the user names and passowrds.

[jon_mcbee]

You will either have to hard code the three files (name and location), have all three files in the same directory and have LabVIEW list files in directory to get their names and act on them, or you can search every drive on your computer for specific file names or specific file extensions in order to locate the files and act on them.

[RavensFan]

What you have is just a subVI.  It can act as a function as part of a larger application.  Or you can build the rest of the application around what you have now.

What does the random number have to do with the password or text files?

You should look at examples on File I/O VI's, and als user dialog VI's in the example finder to see how they work.  Then figure out how you can make them work together with whatever you have in mind for your application.

[Epsilonn]

It is just a homework and I am new at this. An attachment or an example would be most helpfull.

[jon_mcbee]

What version of labview are you using?

[altenbach]

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jmcbee wrote:
What version of labview are you using?

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The attached VI is in 7.1.

[Epsilonn]

I have 8.5 but that is from somewhere else. I don't think this should be a problem.

[smercurio_fc]

Hmmm. this is homework and you're using 8.5 "from somewhere else".....

Hmmm....

[altenbach]

Well, you would create a password dialog. Open your example finder and look for the example "login dialog.vi". Maybe it can give you some ideas. 😄

In the meantime, you might want to cleanup your code a little bit. There is a primitive for 1/x and I am not sure why you do that double-division? Why not e.g. the following:

Both give you equally distributed random numbers over the desired interval (incl. boundaries).

Message Edited by altenbach on 03-12-2009 11:52 AM

[Epsilonn]

Thanks for the tip @altenbach but how can I just include the example you just gave me (the random number generator) in the "login dialog.vi". I want to be promped for user/password and then I want to continue with the random generator providing the fact that the user/password were correct. BTW, where can I change the user/password and the number of users/passwords?