Need help understanding this.

Question

I'm reading the source code for a game that I play:

void gorgeous_set(void)
{
for (int i = 0; i < 11; i++)
{
writeSlot(i, 0x2adc + i); //put item ID of first furniture in series
}
writeSlot(11, 0x2401); //put flooring/wallpaper here.
writeSlot(12, 0x2362);
}

void GoldTools(void)
{
for (int i = 0; i < 6; i++)
{
writeSlot(i, 0x3353 + (i * 4)); //put item ID of first furniture in series
}
}

My question is what is the difference between, what does it mean, and what is happening in these lines:
"(i, 0x2adc + i);" and "(i, 0x3353 + (i * 4));"

Thanks for any help!

Answer 1

These hex values are address of some object.

when we add i*4 the address changes.

0x2adc has different address than 0x3353

Answer 2

0x3353 +i*4 is not equal to 0x3353+i

it is like

5+4 is not equal to 5+1

Answer 3

Hmm. Okay, thank you! Kinnnd of get it now.

Answer 4

Why can you not write (i, 0x3353 + (i * 4)); like this
(i, 0x3353 +i);?
Or vice versa. (i, 0x2adc +i); like
(i, 0x2adc + (i * 4));?