Name: 編程介紹 - 偽代碼介紹 (Programming Intro - Pseudocode Intro)
Uploaded: 2021-01-14T10:09:21.000Z
Duration: 22 min 1 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

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As you know, I am Eli, the computer guy in it, that today's class we're going to be doing an introduction to pseudo code.

So to be clear, pseudo code is not a a really programming language.

Pseudo code is simply where you write out in a human readable fashion.

It's a bit like a verbal version of wire frame.

And basically all you're doing with wire framing is you're taking a pen and paper or maybe a more sophisticated piece of software, and you're simply drawing out what you think your application should look like, and more or less how your application should work so that before you get into actually right in the code before you get into actually building the infrastructure, you can see if it makes sense.

If what you're doing make sense the way you think it does, you can then also have discussion was with any of the interested parties and make sure everybody is on board.

Well, basically, with pseudo code, all we're doing is we're basically doing a type out version of this.

So instead of actually writing out our program in Java script Ph.

Sharp, whatever else we're going to do is in a human readable fashion.

We're going to type out how we expect our software to work.

So basically, what we're going to say is these these are the variables that should be declared.

These are how the variables should be set.

We should insert into that database these particular variables.

After that is done, something else should happen.

And so what this does is before, before you get elbow deep and actually making sure the DL emitters air right?

And you're using the right functions and everything else.

This allows you to sit there, right everything out a logically and just be able to sit there and make sure that it makes sense.

I talked about that in the wire frame in class.

Ah, the whole question of where the time stamp should be added.

So should the time stand be added from a real time clock on the Arduino, or should time stand be added from the PHP?

It sends that information to a PHP script.

And so we could have the timestamp creed created from the Arduino itself.

Or we could have the time stamp created on the pH be script.

Or after I did that video right after I did that video, it showed all this.

You know, some people were saying, Well, depending what database they're using, possibly the my sequel database or the database itself that could automatically add the time stamp.

So the thing is, this is why drawing this stuff out is valuable because we need a time stamp, right?

In order to do some kind of temperature recording system, we just simply need a time stamp but doesn't get at it at the end, you know, doesn't get out of the PCP.

He's my drawing things out, then you can have an argument about where it should be added.

The same is true by doing the pseudo code, right?

When you're doing the pseudo code, when you're writing everything out, you could be right in everything out.

And so you may go down again to connecting to the database is getting into the database.

And so you're thinking Okay, well, we already have.

Database server without her infrastructure.

So I'm going to connect to that database.

Well, then, if you're sitting down and down, you're talking to somebody else.

They may say, Well, you know, has the database administrator So I'm the person responsible for the database server.

I don't feel comfortable with an Arduino device.

Being able to connect to the same server are other systems are connected to, So I don't want you connecting to our server.

You're gonna have to find another solution.

It's sitting there basically says, I know I need to connect to a database server.

Then once you have all the discussions, then you can sit there and write the code to actually connect to the most appropriate database, sir.

The other thing is valuable with pseudo code is there is his idea.

You know, coders, riel coders know everything, right?

They just tippy tap type out all of the code perfectly the first time.

Well, the reality is, is there's a lot of water called frameworks out there.

They're just 1000 different functions out there.

There is a lot of ways to write code for the to be the best in the particular situation for the thing that you're trying to create.

So one of things that you can do is been pseudo code.

Basically, you're just simply writing out in human readable fashion What, you what to happen in your code.

And then what that allows you to dio is that basically paint by numbers, go through and then fill in those blocks?

Okay, I know howto I know how to declare variables, so I just type out the variables I want declare within its possibly setting variables from something like the yard.

We know you may not be sure exactly about how you want to do with that.

You can figure out the best way that you want to set those variables and then then you can go back.

And you can feel that in with how you want to set the variables and basically what you could D'oh is with the pseudo code.

This gives you a paint by numbers format for going back and replacing the human readable code that you read that you've written with the actual programming language that will will actually do the the application that you want.

So this is the basic idea of what we're talking about with pseudo code.

So I've written up a little bit of pseudo code for the project that I was talking about in the wire framing class.

So first, before we get to the pseudo code, let's actually go over the table.

Let me explain to you what we wire framed out up until this point so that the pseudo code will make sense when I'm showing it to you.

So this is a basic wire frame diagram of how our little system that I want to create will operate.

So basically, what I want is I want to create a little temperature humidity sensor and that is going to submit data to a my sequel database.

And then I'm going to get an administration dashboard where I can see what the current temperature is, whether humanity is, and then ch are for the last 24 hours and see a chart for the last week.

So again, this is a very, very basic system that were created.

And so within this particular wire frame, a diagram, a TTE.

First, we have the Arduino see yard we know is actually going to have a temperature sensor on the humidity sensor connected to it.

It will then send the data to a PHP script.

PHP script will parse the values from the humidity and temperature sensor.

It will then create the variable values for temperature and humidity.

So for here I'm actually at the time stamp on the pH be script.