Indirect Addressing and Variables Part 2

00:00

Now we're going to do an example. So we're going to define a string, and then we're gonna print off that string, and then we'll modify it and we'll print off the modified string.

00:10

So I got my editor here. I've already created my project, which we also know how to do.

00:16

So let's define our string.

00:26

Okay, So I define my characters, put on end

00:30

of string here until Terminator

00:34

No, go ahead and friended off. So we should know how to do this movie a X. Hello?

00:41

Call print string.

00:45

It will call Brent

00:48

New line.

00:50

Okay, so now what I want to do is I want to modify it. So I'm going to change the w from a lower case w to an uppercase w So again, move my address into the A X.

01:02

And then if we calculate, we can see that the word hello has five letters and then there's a space so six

01:08

So we're going to add ta x, The number six.

01:15

There we go

01:19

and then we'll go ahead and move a bite into that location. So

01:23

I only want to write one bite

01:26

wagons fell

01:30

the value at e X

01:34

and I'm gonna change that to an uppercase W. And so I put a lower case W. And now I've modified that

01:41

So the Nike again can move into ea X the value of hello,

01:46

call print

01:48

String and the new line.

01:56

So I go ahead and modify that, and then I'll go ahead and print off my string again.

02:00

So we'll go ahead and build it

02:06

so we can see that we printed off the original, and then we modified it by figuring out our offsets and go ahead and changing that.

02:16

So today we talked about in director address ing.

02:20

We created some variables. We modified some variables, and then we modified a string using offsets.

02:28

So here's a quiz

02:30

given the following. So we have a segment in our segment, data we have Hello. And then this is a test.

02:37

So you should think about how do you get the address of the variable? Hello?

02:40

And how do you get the data at the location? Hello.

02:46

You can pause a lecture.

02:50

So to get the address of the variable holo where you don't use the brackets and to get the data at that location, you do use the brackets.

03:00

So, looking forward, we're gonna talk about the stack,