And after?

After foo exits, b is gone..but the address is still valid in the heap

b is destroyed and a will never be changed to b's value

b is destroyed and a will never be changed to b's value

Yes b is destroyed. but what matters is the address that is still valid because the heap has not released the memory

After foo exits, b is gone..but the address is still valid in the heap

But you didn't save this address

Yes b is destroyed. but what matters is the address that is still valid because the heap has not released the memory

Right

But you didn't save this address

Do I really need to? If I know the address(which is same throughout the program) why is there a need to save it

Do I really need to? If I know the address(which is same throughout the program) why is there a need to save it

Wtf

a needs to know the address, not you

Do I really need to? If I know the address(which is same throughout the program) why is there a need to save it

Wtf. Right after the call you lost this address. You don't know it. It's gone

a needs to know the address, not you

Of cors, a has the address (which is same throughout the program). I am sorry if I am not able to explain my point well

Of cors, a has the address (which is same throughout the program). I am sorry if I am not able to explain my point well

But if it doesn't work....

You can't get it outside, cause only b holds it

And b is gone

Wtf. Right after the call you lost this address. You don't know it. It's gone

Wait...I will gdb and double check the addresses pointed to by a before foo and after foo.

If they are same, my point stand valid..right?

No

Wait...I will gdb and double check the addresses pointed to by a before foo and after foo.

Drop gdb and think about how pass-by-value works

Why

Or add a lot if debug print

Or add a lot if debug print

Like, print b before return and a after call

I will get back in some time once I am on PC. Thanks for your time though

Hey guys how do i test for_each_n in Linux It's showing not a member of 'std'

Hey guys how do i test for_each_n in Linux It's showing not a member of 'std'

Have you included <algorithm>?

And you need to make sure that your compiler is supporting C++17, and you've enabled it. E.g. for gcc you need to add -std=c++17 flag. https://en.cppreference.com/w/cpp/algorithm/for_each_n

Yes yes Not working

My GCC version is 7.4.0

My GCC version is 7.4.0

I have the same version, let me check

My GCC version is 7.4.0

Confirm, I have the same error. Maybe a newer version of compiler is needed

Confirm, I have the same error. Maybe a newer version of compiler is needed

I guess it would Work in LLVM

Confirm, I have the same error. Maybe a newer version of compiler is needed

Isn't 7.4 really old?

Yus

But it's not working even in online compilers 🤔

Can i see the snippet of the code?

Some C++17 things were added as recently as 9.1

Don't expect something as old as 7.4 to work well with C++17

But it's not working even in online compilers 🤔

Yes, just found out that if you press "Run this code" on this page it will show the same error https://en.cppreference.com/w/cpp/algorithm/for_each_n

Confirm, I have the same error. Maybe a newer version of compiler is needed

Which os do you have?

Which os do you have?

Ubuntu LTS

Ubuntu LTS

Oh

You really should build yourself a gcc toolchain, because that's very outdated

Or install a better distro ( ͡° ͜ʖ ͡°)

Or install a better distro ( ͡° ͜ʖ ͡°)

Meh😅😅😅

Nah, I pretty satisfied with it. The compiler supports most of the C++17 features that I need.

Or install a better distro ( ͡° ͜ʖ ͡°)

Like Fedora u.u

My code doesn't use reference. It's a C program

Hi

Yes, just found out that if you press "Run this code" on this page it will show the same error https://en.cppreference.com/w/cpp/algorithm/for_each_n

That's what I am talking about Is there an online compiler which supports this??

That's what I am talking about Is there an online compiler which supports this??

godbolt.org

https://stackoverflow.com/questions/46468114/for-each-n-is-not-a-member-of-std-in-c17

How to take multiple input of integer type in single row

Yeah.. Just use space to separate them

Yeah.. Just use space to separate them

Thanks it works

Cool

Hi

I have a question

Ask... 423 members are online

Can someone help? I'm confuse with the stop command

Can someone help? I'm confuse with the stop command

are you talking about returning?

yes

what are you confused about

returning a value isn't black magic

😂

Can someone help? I'm confuse with the stop command

The stop is a flag.. When the input from the user is stop, you'd print some text and maybe quit the program or something.. In all I am sure the stop is a flag.. ❤

The stop is a flag.. When the input from the user is stop, you'd print some text and maybe quit the program or something.. In all I am sure the stop is a flag.. ❤

this

The stop is a flag.. When the input from the user is stop, you'd print some text and maybe quit the program or something.. In all I am sure the stop is a flag.. ❤

thank you

if a and b are pointing to the same address and it's not lost, why can't I access the array from inside main?

Looks like you literally reallocated 'a' in foo

If you uncomment 18 line and pass it in foo you don't need malloc at 7 line

I have probably misunderstood your question...

I have probably misunderstood your question...

He does not ubderstand that realloc does not allocate memory from the given address, but it actually changes the address

Hence a != b after realloc

foo gets a copy of a

Not 'a' itself in that example

What is x86 or 64 bit

What is x86 or 64 bit

Size of machine word. Only thing you definitely should know: it affects sizeof pointer and sizeof size_t

What is x86 or 64 bit

Architecture

Hlo

Hello

Hii

#include <stdio.h> void main() { char s[1000]; int count = 0,i = 0; printf("Enter a sentence\n"); scanf("%[^\n]s", s); while (i < s[i]) { if (s[i] != ' ') { s[count] = s[i]; count++; } i++; } printf("Length of semtence excluding space is %d", I want to print the number of character in sentence excluding space And using while loop and without using #include<string.h> What should i do further to print the number of character?