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the best way is to tokenize the whole string without (s)(f)scanf

but if i have mpzt array, how can i export it in uint8 pointer?

https://pastebin.com/SufSLXvJ

the best way is to tokenize the whole string without (s)(f)scanf

so just strtok with whitespace and bye bye

ptr1 = malloc.. ptr2 = ptr1 ++ptr2; ptr2 += 5.. etc.. free(ptr1)

is possibile do this in loop?

show code, I can`t understand your idea

show code, I can`t understand your idea

https://pastebin.com/UNrp7L7z

you should assign pointer2=pointer only one time

and then increment pointer2 in loop

I can`t understand your idea at all for (int i=0; i<4; i++){ *pointer=i; *pointer2=pointer; ++pointer2; *pointer2=i; }

what do you want to do?

create a uint8 pointer and assign values from an array to it

like my problem mpz

just use memcpy

Does anyone know why the following link doesn't work: www.stroustrup.com/Programming

just use memcpy

the problem is concat

?

No, I didn't. /programming.html works well. But the problem is with /Programming which is the supportive link for PPP book.

Thanks... I might consider sending an email to Bjarne Stroustrup himself about that.

Can anyone please explain what this syntax is?

Can anyone please explain what this syntax is?

Child(int j) : Parent(j)

Intializing (parameterized constructor) of base class from (parameterized constructor ) of derived class

My doubts are 1. There is no member variable in both child class, so what actually the parameterized constructor intializing here

2. Constructor are used to initialise member variable right? But can we create a new variable inside constructor and then intialise it from constructor itself

/warn no screen photos

2. Constructor are used to initialise member variable right? But can we create a new variable inside constructor and then intialise it from constructor itself

Mostly yes Constructors are used to initialize state of objects. In good programs state of objects are only dependent on member variables

But sometimes it can be global variables

And it's mostly bad

Or you can call global functions in the constructor

Can anyone differentiate between c , c++ and c++ and in which development they are used??

c#

Or you can call global functions in the constructor

Yeah that's is fine....but my question is .....what's the point of declaring new member inside a constructor and intializing them?

Mostly commonly what I have seen is declaration happens in class (outside constructor) and only intialization happens in constructor

Yeah that's is fine....but my question is .....what's the point of declaring new member inside a constructor and intializing them?

If you declare a variable inside a constructor it's not a member variable of a class

If you declare a variable inside a constructor it's not a member variable of a class

Oh okie...that makes sense...but we can print it and intialise it with passing argument from object?

Oh okie...that makes sense...but we can print it and intialise it with passing argument from object?

I don't understand what you mean

In this example....I'm passing value= 10 as argument

So?

Which is getting saved in a new variable declared inside constructor (not a class member)

So how that variable ( int x= i ) got it's value

When I'm passing a value =10 from Child class type of object

As you said - Class Parent{ Public: Parent(int i) { Int x= I ; // x not a class member here } };

So how Child class object is passing value to this variable 'x' ?

So how Child class object is passing value to this variable 'x' ?

before Child constr, Parent constructor is called with argument i(from Child constr), which creates x variable and init it with i

before Child constr, Parent constructor is called with argument i(from Child constr), which creates x variable and init it with i

Yeah that makes sense....before parent constr called before child constr

But how it took the parameter value i, before even getting called?

Moreover.....this syntax of passing object argument from child to parent class is confusing.....can please someone elaborate: Child(int j) : Parent(j)

you pass parameter to Child constr, it starts with initializer list. Parent in the initializer list. so Parent is called with i argument

Moreover.....this syntax of passing object argument from child to parent class is confusing.....can please someone elaborate: Child(int j) : Parent(j)

Who's calling whom here?

constructor(args..): initializer_list { body.. } before body constructor deals with initializer list

you pass parameter to Child constr, it starts with initializer list. Parent in the initializer list. so Parent is called with i argument

Ohh okkie....before processing the child constr body.....intialiser list things getting processed- > so parent constr

Got it...thanks for essential piece man👍

if Parent is not in initialiser list it will be called anyway(with no arguments)

Can you clarify why not mentioning (int j) instead of (j) here for parent ? Child(int j) : Parent(j)

you already have Parent(int i)

so its like you have function void parent(int i) and then call it in child void child(int j) { parent(j); }

so its like you have function void parent(int i) and then call it in child void child(int j) { parent(j); }

Yeah got it....this is more clear and understandable syntax to use....wonder why we even use intiliaser list...anyway can google that thing

Btw thanks @kasha131

👍 appreciate

Yeah got it....this is more clear and understandable syntax to use....wonder why we even use intiliaser list...anyway can google that thing

if you don`t use initializer list, for every field and parent class default constructor is called. Thus, if you want to initialize variable with value is more efficient to do it like this constructor() : value("string") { } than constructor() { value = "string"; } cause in the second case default string() constructor is called for value, and then assignment operator. in the first case just constructor

I need help with this 👇🏾 Using the formula A=ab(Siny/2) write a c# program to calculate the area of a triangle where Y=60degrees and a=b= 13cm

What's the size of a shared_ptr's control block?

What's the size of a shared_ptr's control block?

No one knows

How can I find out for my implementation though?

How can I find out for my implementation though?

Read the sources😂

But why do you even care?

What's the size of a shared_ptr's control block?

what is control block?

Because I've implemented my own reference counting and want to compare

Read the sources😂

How would I find those? On my system somewhere in the <memory> implementation?

Because I've implemented my own reference counting and want to compare

Well in most cases the control block contains: 1) atomic ref counter for std::shared_ptr 2) atomic ref counter for std::weak_ptr 3) deleter object

I know what's in it, but I'd like to find the concrete numbers :)

How would I find those? On my system somewhere in the <memory> implementation?

So perhaps this?

Thanks @unterumarmung

How would I find those? On my system somewhere in the <memory> implementation?

You can try this, yeah

Thanks @unterumarmung

???

How would I find those? On my system somewhere in the <memory> implementation?

But depending on C++ stdlib you're using you can find the sources on GitHub

Yeah I was just now searching how to determine which I was using

Yeah I was just now searching how to determine which I was using

Which compiler do you have?