In the screenshot it said x = *(++p) and iirc that is not the same as saying x = *(p++) or x = *(p += 1)
As in my example using ++p will return the new value after increment and p++ or p+=1 will return the value before the increment happens, and then increment the variable.
Or at least that is how I remember it working based on other languages.
I’m not sure what the * does, but I’m assuming it might be a pointer reference? I’ve never really learned how to code in c or c++ specifically. Though in other languages ( like PHP which is based on C ) there is a distinct difference between ++p and (p++ or p+= 1)
The last two behave the same. Though it has been years since I did a lot of coding. Which is why I asked.
I’ll install the latest PHP runtime tonight and give it a try xD
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++p
will increase the value and return the new valuep++
will increase the value and return the old valueI think
p = p + 1
is the same asp++
and not as++p
. No?In C an assignment is an expression where the value is the new value of what was being assigned to.
In
a = b = 1
, both a and b will be 1.is the same as
, so ++p.
What I meant was:
In the screenshot it said
x = *(++p)
and iirc that is not the same as sayingx = *(p++)
orx = *(p += 1)
As in my example using ++p will return the new value after increment and p++ or p+=1 will return the value before the increment happens, and then increment the variable.
Or at least that is how I remember it working based on other languages.
I’m not sure what the * does, but I’m assuming it might be a pointer reference? I’ve never really learned how to code in c or c++ specifically. Though in other languages ( like PHP which is based on C ) there is a distinct difference between
++p
and (p++
orp+= 1
)The last two behave the same. Though it has been years since I did a lot of coding. Which is why I asked.
I’ll install the latest PHP runtime tonight and give it a try xD
(p += 1) resolves to the value of p after the incrementation, as does ( p = p + 1).
Yes.
p++
==p+= 1
==p = p + 1
are all the same if you use it in an assignment.++p
is different if you use it in an assignment. If it’s in its own line it won’t make much difference.That’s the point I was trying to make.
No.
++p returns incremented p.
p += 1 returns incremented p.
p = p + 1 returns incremented p.
p++ returns p before it is incremented.
Right. So i had them the other way around. :D
Thanks for clarifying.