Difference Between Reference And Pointers In C++
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As the title say there is very big difference between reference and pointer in c++. So lets learn them and do comment if you have any question about the video.
#cpp #tutorial #interviewquestions #computerscience #softwareengineering
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And this will help me a-lot.
Reference can extend the lifetime of a temporary object. In C++ if you bind a const reference to a temporary object, the lifetime of that object becomes the lifetime of the reference.
i have seen many channels regarding c++ but your content is to the point and also that extra knowledge about things is amazing
Thanks dude.. :)
Great video.
Thanks man..
I absolutely love your videos Cpp Nuts. If it weren't for you guys, I would have never learned MultiThreading so fast.
I just wanted to point out that at 07:00 - You mention that r++ is impossible and (&r)++ is possible, whereas its the opposite.
You will get the following error at (&r)++ -> error: increment of read-only location ‘& r’
Whereas r++ will just increment i by 1, so i and r will become 11.
Love your content. And a major salute to Team CppNuts.
Hi, Thanks a lot for your noble effort of adding cpp videos. I have a question. Please let me know when to use only pointer and when to use only reference while writing a program. What is the real life usage of reference over pointer? If reference and pointer both are present in C++ means there should be some situations where only reference is useful and some places where only pointer is useful. Thanks in advance.
Awesome video! Thank you for it!
Ady2xp, thank you so much.
Best cpp lecturer on CZcams.
Thanks man..
Sir,you covered more than expected content.might be you are the only one
+Ankit Makadia thanks man.. :)
Excellent Explanation, love it
Thanks
Your Regular follower now..:D
Prepare a video on Red Black tree in DS..
And yeah keep it up !!
Hi Dhawal Arora, Let the data structures & algorithms turn come. :D
I am trying my best to reach that list ASAP, and thanks for following my videos dude.
No worries dude,Keep it up..we are with you !!
+Dhawal Arora, thanks dude..
really clear, thank u sir!
Glad it helped!
Keep up the good work ☺👌
Sridhar Pm, glad you liked it.
Nice video. Having a doubt in indirection:
Can we consider this as multiple indirection?
int i=1;
int &r=i;
int &j=r;
int &e=j;
int &m=e;
cout
Very helpful.
thx
glad it helped.
&: you can make a copy or pass a reference, you need to have an independent copy(y = x) that will change from the original or you need to modify the same source value somewhere else(&y = x).
*: you need to index something, even the CPU indexes it's instruction code and registers incrementors through your program with the same feature gained from a pointer.. anything can be indexed... the heap is only accessible by registers tracking your stuff on the heap by address values stored in the stack by hard design.. you can't get past the extra *dereference to gain access to the stuff you have out there. stack: a memory address containing a value, heap: a memory address containing a memory address that containing a value/structure/etc.
plz make a video of difference b/w function overloading and overriding ......
+Srinivas KL, here is that video, what you asked for czcams.com/video/CdVpbjFetD8/video.html
Thank you .....
+Srinivas KL you are most welcome :)
Can you elaborate what is the use of creating a reference to a reference ?
How members are accessed through reference?
hold on. reference variable must occupy a space somewhere. i get it that it is an alias. but there must be a space for alias.
hold on. if p is a pointer to an int. int *p; int i = 10 p=i; *p is 10. p is the address of i.&p is the adress of p. is this correct?
Yes correct but assume mean to say p=&i; in your comment then everything you wrote is valid.
Thanks
Welcome
@3:25 why it is different?
good work
Thank you! Cheers!
I think you missed 1 poimt which that we cannot have array of references but with pointers it is possible
Oh.. great.. Thanks for pointing this out.
I should pin this comment so that few people would get benefited from this comment.
at 6:58 You say (&r)++;. This is an error, right?
right
int a = 10;
int *p = &a;
p and a should have the same address. I tried it on my computer.
p is holding the address of a, but p will have its own address, then only p can store the address of a right??
if(p == &a) is true
Ok, I can see all these differences. But what is actually the purposes of references? Why did people decide to introduce them? To me references look like synonyms for variable names, so I can use "r" instead of "i", but what's the point? Why SHOULD I use "r" rather than "i"?
Suppose u want to have another variable with the same value...so to keep the other variable update and also reuse the memory of previous variable..we just store references.
u said reassignment is not possible with reference. then u put r = var and accepted that how its possible then ? i didn't get this point watching 2 times. please explain
I would have said that once reference is pointing to something, then we can not change it to refer something else.
And when you are creating reference that time only you have to initialize to which it should refer. And then it will not change what it is referring to.
And you can not just create reference variable without making it refer something.
i am also saying that &r = i; which is pointing to something. then how u changed r = var; ?
Actually you are not changing the reference, you are changing the value at i with var.
Nice, but I would write Address Arithmetic Operations for 4th.
I do not see how someone deem this a good and precise explanation. Thanks for removing dislike, CZcams broncos.
I appreciate that!
You talk WAY too fast in the beginning of your videos. It's virtually impossible to understand what you're actually saying.
Otherwise, it was a nice video and a good review of references compared to pointers in C++. I might have made use of *nullptr* instead of NULL for initializing the pointer, but that's not a huge deal. It's just the new C++.
Tom B, i will work on my speed, thanks man.. :)
All your viideos are awesome. Only thing hurts to (my) ears are your fake accent.
😂
That is not a good explanation.
What happened?