gotta post new rules

I think it is unreasonable to forbid us to use pastebin in a program language group...What should I do if I want show some large code?

I think it is unreasonable to forbid us to use pastebin in a program language group...What should I do if I want show some large code?

just post the bin ID we'd just append it to the usual base url

I mean there are almost 16.000 users

imagine if everybody wrote at once.

just post the bin ID we'd just append it to the usual base url

Got it! thank you.

I think it is unreasonable to forbid us to use pastebin in a program language group...What should I do if I want show some large code?

Pastebin is not prohibited here. Infact it is encouraged. However, if you are a new user, you are restricted from posting URLs to avoid spam. That restriction would be relaxed if you have posted here for a while.

I'm making my own pair (I really need to) template <typename T> struct pair{ T first; T second; }; how could I make it so that it accepts assign like this: my_pair = {1, 2};?

Ok, this alone does work for what I want to do https://en.cppreference.com/w/cpp/language/aggregate_initialization

Ok, this alone does work for what I want to do https://en.cppreference.com/w/cpp/language/aggregate_initialization

This is what I mentioned here https://t.me/programminginc/442373

This is what I mentioned here https://t.me/programminginc/442373

Oh, sorry, I didn't follow the conversation. Thanks

Hi, I have a problem with cmake

CMakeList.txt: https://nekobin.com/jeposomope Build Traceback: https://nekobin.com/salatigare

Hi guys

A company stores the age and salaries of its employees.Write a program that gives us how many employees who are older than L years get a salaryless than M.Input The frst line of the standard input contains the count of employees (1≤N≤100), theage limit (1≤L≤100) and the salary limit (1≤M≤2000000). The next N lines contain theage (1≤A≤100) and salary (1≤S≤2000000) of an employee each.Output The frst line of the standard output should contain the count of employees who areolder than L and earn more than M. Example Input 6 40 200000 42 150000 33 100000 25 600000 66 80000 25 200000 42 800000 Output 2

I need your help please 😢🙏

A company stores the age and salaries of its employees.Write a program that gives us how many employees who are older than L years get a salaryless than M.Input The frst line of the standard input contains the count of employees (1≤N≤100), theage limit (1≤L≤100) and the salary limit (1≤M≤2000000). The next N lines contain theage (1≤A≤100) and salary (1≤S≤2000000) of an employee each.Output The frst line of the standard output should contain the count of employees who areolder than L and earn more than M. Example Input 6 40 200000 42 150000 33 100000 25 600000 66 80000 25 200000 42 800000 Output 2

Which part do you need help with?

Who's know why i need to create a second template to make operator<< friendly? template <typename T> class List { template <typename Type> friend std::ostream & operator<<(std::ostream & os, const List <Type> & list); ... }; template <typename T> std::ostream & operator<<(std::ostream & os, const List <T> & list) { if (!list.is_empty()) { Node <T> * tmp = list.head; while (tmp != nullptr) { os << tmp->data << " -> "; tmp = tmp->next; } } return os; }

Anyone use vs codium?

Anyone use vs codium?

It just VS Code without proprietary like Chromium does

Thank you

Hi, I need advice. class TObserver { public: virtual ~TObserver(void) = default; virtual void dataChanged(void) = 0; }; using TObserverSptr = std::shared_ptr<TObserver>; class TObservable { private: std::list<TObserverSptr> m_clObservers; public: void notifyChanged(void) { for (const TObserverSptr& o : m_clObservers) o->dataChanged(); } void subscribe(const TObserverSptr& rObserver) { m_clObservers.push_back(rObserver); } }; // worker class, that implements same work class TWorkerImpl : public TObserver, // I want to maka PROTECTED inheritance protected std::enable_shared_from_this<TWorkerImpl> { protected: // I placed this function in protected section, despite public inheritance. // Is it OK? virtual void dataChanged(void) override {} public: void attach(TObservable* pObservable) { pObservable->subscribe(shared_from_this()); } void doSomeWork(void) { // some work here ......... } }; In this example, I am forced to use public inheritance from TObserver. But I want to use protected one. I don't need to use TWorkerImpl as TObserver anywhere, except in TWorkerImpl::attach. But it is required by std::shared_ptr for implicit conversion TWorkerImpl to TObserver. How can I do without public inheritance? Is it worth to get it?

Hello, i am just learning c programming and i am trying to write a program that increases salary at the same percentage for five months while tax remain the same.

Hello, i am just learning c programming and i am trying to write a program that increases salary at the same percentage for five months while tax remain the same.

Show the code

Guys I need some help, please 😭😢

Guys I need some help, please 😭😢

Don't ask to ask, just ask

Hello, i am just learning c programming and i am trying to write a program that increases salary at the same percentage for five months while tax remain the same.

It is easy. D%- percentage of salary increased ,T- tax Si - initial salary S -salary after number of n months S= (Si+T)*(((100+D)/100)^n)-T

Hi, I need advice. class TObserver { public: virtual ~TObserver(void) = default; virtual void dataChanged(void) = 0; }; using TObserverSptr = std::shared_ptr<TObserver>; class TObservable { private: std::list<TObserverSptr> m_clObservers; public: void notifyChanged(void) { for (const TObserverSptr& o : m_clObservers) o->dataChanged(); } void subscribe(const TObserverSptr& rObserver) { m_clObservers.push_back(rObserver); } }; // worker class, that implements same work class TWorkerImpl : public TObserver, // I want to maka PROTECTED inheritance protected std::enable_shared_from_this<TWorkerImpl> { protected: // I placed this function in protected section, despite public inheritance. // Is it OK? virtual void dataChanged(void) override {} public: void attach(TObservable* pObservable) { pObservable->subscribe(shared_from_this()); } void doSomeWork(void) { // some work here ......... } }; In this example, I am forced to use public inheritance from TObserver. But I want to use protected one. I don't need to use TWorkerImpl as TObserver anywhere, except in TWorkerImpl::attach. But it is required by std::shared_ptr for implicit conversion TWorkerImpl to TObserver. How can I do without public inheritance? Is it worth to get it?

First of all virtual functions and access specifiers don't mix well. You can have a virtual function in the public section in a base class and override it as a private function in the derived class and yet still call this private function through a pointer or reference to the base class. I usually follow Herb Sutter's advice where I make my virtual functions private/protected and normal public methods as non virtual wherever possible. I call the virtual functions from within the public methods. In your case, you can define the dataChanged method in TObserver class as protected. Add another public non virtual function like onDataChange and call the dataChanged function from within it. Now in your TWorkerImpl class, you can use protected inheritance and override the dataChanged method as a protected method and things would work just fine

First of all virtual functions and access specifiers don't mix well. You can have a virtual function in the public section in a base class and override it as a private function in the derived class and yet still call this private function through a pointer or reference to the base class. I usually follow Herb Sutter's advice where I make my virtual functions private/protected and normal public methods as non virtual wherever possible. I call the virtual functions from within the public methods. In your case, you can define the dataChanged method in TObserver class as protected. Add another public non virtual function like onDataChange and call the dataChanged function from within it. Now in your TWorkerImpl class, you can use protected inheritance and override the dataChanged method as a protected method and things would work just fine

It didn't help. class TObserver { protected: virtual void doDataChanged(void) = 0; public: virtual ~TObserver(void) = default; void dataChanged(void) { doDataChanged(); } }; using TObserverSptr = std::shared_ptr<TObserver>; class TObservable { private: std::list<TObserverSptr> m_clObservers; public: void notifyChanged(void) { for (const TObserverSptr& o : m_clObservers) o->dataChanged(); } void subscribe(const TObserverSptr& rObserver) { m_clObservers.push_back(rObserver); } }; // worker class, that implements same work class TWorkerImpl : protected TObserver, // I want to use PROTECTED inheritance, but I can't protected std::enable_shared_from_this<TWorkerImpl> { protected: // I placed this function in protected section, despite public inheritance. // Is it OK? virtual void doDataChanged(void) override {} public: void attach(TObservable* pObservable) { // !!! error: no viable conversion from 'shared_ptr<TWorkerImpl>' to 'const shared_ptr<TObserver>' pObservable->subscribe(shared_from_this()); // no viable conversion } }; The compiler can't provide implicit conversion from TWorkerImpl to TObserver. In my opinion, it is due to fact that type conversion mast be inside copy constructor of std::shared_ptr<TObserver> which is not friend to TWorkerImpl. I don't know, how to allow such type conversion from within TWorkerImpl::attach. Sorry for my English.

Find the error in the code and explain why int y, *yptr; *yptr = 10; yptr = &y; y = 5; *yptr = 10; cout << *yptr;

Find the error in the code and explain why int y, *yptr; *yptr = 10; yptr = &y; y = 5; *yptr = 10; cout << *yptr;

yptr is undefined pointer, changing value in undefined pointer

yptr is undefined pointer, changing value in undefined pointer

i didn't understand

i didn't understand

yptr is undefined so it points to random address

yptr is undefined so it points to random address

ok thank you

ok thank you

Please don't pm

The compiler should be smart enough to tell you what's the problem

The compiler should be smart enough to tell you what's the problem

If it's a modern compiler and warnings are enabled

If it's a modern compiler and warnings are enabled

BOrlAnd C++

where is the error and why? int data; int*const ptr = &data; *ptr = 5; ptr = NULL; int*const ptr2;

It didn't help. class TObserver { protected: virtual void doDataChanged(void) = 0; public: virtual ~TObserver(void) = default; void dataChanged(void) { doDataChanged(); } }; using TObserverSptr = std::shared_ptr<TObserver>; class TObservable { private: std::list<TObserverSptr> m_clObservers; public: void notifyChanged(void) { for (const TObserverSptr& o : m_clObservers) o->dataChanged(); } void subscribe(const TObserverSptr& rObserver) { m_clObservers.push_back(rObserver); } }; // worker class, that implements same work class TWorkerImpl : protected TObserver, // I want to use PROTECTED inheritance, but I can't protected std::enable_shared_from_this<TWorkerImpl> { protected: // I placed this function in protected section, despite public inheritance. // Is it OK? virtual void doDataChanged(void) override {} public: void attach(TObservable* pObservable) { // !!! error: no viable conversion from 'shared_ptr<TWorkerImpl>' to 'const shared_ptr<TObserver>' pObservable->subscribe(shared_from_this()); // no viable conversion } }; The compiler can't provide implicit conversion from TWorkerImpl to TObserver. In my opinion, it is due to fact that type conversion mast be inside copy constructor of std::shared_ptr<TObserver> which is not friend to TWorkerImpl. I don't know, how to allow such type conversion from within TWorkerImpl::attach. Sorry for my English.

Oh I thought from your question the problem was defining a virtual function as protected despite it being public in the base class. I thought you wanted to design it better. The problem here is that you want to convert a shared_ptr to a derived class to shared pointer to a base class. This conversion is possible only when the inheritance is public. There is no other way around this.

where is the error and why? int data; int*const ptr = &data; *ptr = 5; ptr = NULL; int*const ptr2;

6 int data; 7 int*const ptr = &data; 8 *ptr = 5;  9 ptr = NULL; ■ Cannot assign to variable 'ptr' with const-qualified type 'int *const' 10 int*const ptr2;

https://github.com/Perfare/Il2CppDumper

I bet it is an ad acount.

I can use Win32 lib for cross-platform use?

Hello everyone

Hello everyone

Hello 😊

c++ I have a a json file and I have to read it using nlohmann. As I read it, I have to also put the keys in the map object that I have created (which in turn have a map object as json can have further keys inside keys). I have used ifstream with nlohmann::json Ifstream MyFilecontent >> nlohmann::json But i don’t know how to go ahead from here. Could anyone please help?

Nlohmann is a library for json in c++.

i cant read books, i only watch lectures, i use my udemy premium account, its enough right?what more in books?

Anyone wants to discuss some projects ideas with me

Find the error in the following code and explain why. int data; const int* ptr; ptr = &data; *ptr = 5;

Anyone wants to discuss some projects ideas with me

u can code any app?

i also want to work with

Anyone wants to discuss some projects ideas with me

for which all os devices u code for

printf("The increment is:%f\n", outstanding);         printf("Increment and Tax over the five years\n");         multiplier = 1;         float newtax = 0.25 * (outstanding * grosssalary + grosssalary);         float newpay = grosssalary + (grosssalary * outstanding);         float newnet = newpay - newtax;         float newincrement = outstanding * grosssalary;                 for (multiplier = 1; multiplier <= 5; multiplier = multiplier + 1)         {             printf("year %d: %f",multiplier, newtax);             printf(" %f\n", newnet);         }         

Please how do i make this program increase pay by 25 percent continously for 5 times will tax is deducted as well

I meant while tax ia deducted as well

Here is the question i am trying to solve: if an employee is giving the same salary increment every year for the next 5 months calculate the per montj net pay after tax deduction of 25%

Show the code

printf("The increment is:%f\n", outstanding);         printf("Increment and Tax over the five years\n");         multiplier = 1;         float newtax = 0.25 * (outstanding * grosssalary + grosssalary);         float newpay = grosssalary + (grosssalary * outstanding);         float newnet = newpay - newtax;         float newincrement = outstanding * grosssalary;                 for (multiplier = 1; multiplier <= 5; multiplier = multiplier + 1)         {             printf("year %d: %f",multiplier, newtax);             printf(" %f\n", newnet);         }         

I can use Win32 lib for cross-platform use?

You can't, it's closed source. But you can run windows apps on POSIX OS using wine compability layer.

You can't, it's closed source. But you can run windows apps on POSIX OS using wine compability layer.

Thanks

Thanks

But native binary is better than run it using compability tool

But native binary is better than run it using compability tool

Thanks, what library can i use without rewriting all the code?

I can throw off the code here for evaluation and criticism, but am I still using SFML?

Thanks, what library can i use without rewriting all the code?

I think you can't. I never find someone implementing Windows API to POSIX API. But you can compile POSIX header in Windows with Unix compability layer using Cygwin or MinGW. some of posix header is unistd.h. Unix compatibility layers such as Cygwin and MinGW also provide their own versions of unistd.h. In fact, those systems provide it along with the translation libraries that implement its functions in terms of win32 functions. https://en.wikipedia.org/wiki/Unistd.h

I think you can't. I never find someone implementing Windows API to POSIX API. But you can compile POSIX header in Windows with Unix compability layer using Cygwin or MinGW. some of posix header is unistd.h. Unix compatibility layers such as Cygwin and MinGW also provide their own versions of unistd.h. In fact, those systems provide it along with the translation libraries that implement its functions in terms of win32 functions. https://en.wikipedia.org/wiki/Unistd.h

Thanks)

I just started writing this, but I want to hear your opinion and criticism #include <SFML/Graphics.hpp> #include <iostream> using namespace std; using namespace sf; #define NumberButton 9 RenderWindow window(VideoMode(800, 600), "Encryption", Style::Close); struct MyChoice { string MyChoice; }; int main() { MyChoice MyChoice; Texture background; Sprite BACKGROUND; background.loadFromFile("texture/background.jpg"); BACKGROUND.setTexture(background); BACKGROUND.setScale( window.getSize().x / BACKGROUND.getGlobalBounds().width, window.getSize().y / BACKGROUND.getGlobalBounds().height); Image icon; if (!icon.loadFromFile("texture/icon.png")) return EXIT_FAILURE; window.setIcon(icon.getSize().x, icon.getSize().y, icon.getPixelsPtr()); window.setVerticalSyncEnabled(true); string* TEXT = new string[NumberButton]{ "Encryption:", "Decoding:", "Caesar cipher", "Vernam cipher", "Hill cipher", "Vigenère cipher", "Gronsfeld cipher", "Rivest–Shamir–Adleman" }; Text text[NumberButton]; Font font; if (!font.loadFromFile("font/AnonymousPro-Bold.ttf")) return EXIT_FAILURE; for (size_t i = 0; i < NumberButton; i++) //set textures and sprites { if (i < NumberButton - 1) text[i].setString(TEXT[i]); text[i].setFont(font); text[i].setCharacterSize(24); text[i].setFillColor(Color::Red); if (i > 1 || i < NumberButton - 1) text[i].setPosition(500, 75 + ((i - 2) * 50)); } text[0].setPosition(120,75); //Encryption text[1].setPosition(120,300); //Decoding MyChoice.MyChoice = "Cipher: " + TEXT[2]; text[NumberButton - 1].setString(MyChoice.MyChoice); text[NumberButton - 1].setPosition(10, 10); delete[]TEXT; TEXT = nullptr; while (window.isOpen()) //drow sprite { Event event; while (window.pollEvent(event)) { if (event.type == Event::Closed) window.close(); } window.clear(); window.draw(BACKGROUND); for (size_t i = 0; i < NumberButton; i++) { window.draw(text[i]); } window.display(); } }

Hello, Can someone help me iterate over a nested json object and mapping each key to a map using nlohmann’s library?

Any one here those very good knowledge c

Solved any problem

Hello, Can someone help me iterate over a nested json object and mapping each key to a map using nlohmann’s library?

By "nested json" you mean nested json object or json written as a string to a json field?

Hello, Can someone help me iterate over a nested json object and mapping each key to a map using nlohmann’s library?

If nested json object, you can do get("name") on it, and just iterate over the result using renged for loop Here are some examples: https://json.nlohmann.me/features/iterators/#access-object-key-during-iteration

this is the window for my text encryption program

Thanks

Why not use latest c++ 20 standard and where you need to go cross platform either use 3rd party libraries like Gtkmm for gui ?

Why not use latest c++ 20 standard and where you need to go cross platform either use 3rd party libraries like Gtkmm for gui ?

have to rewrite a lot of code

oof

I can use Win32 lib for cross-platform use?

you can with MONO (.NET C# )

you can with MONO (.NET C# )

I use C++

tho probably not the WIn32 API explicitly but most all of .NET except the windows Win32 API (eg HANDLE, PVOID, etc are all part of Win32 API) are portable

tho probably not the WIn32 API explicitly but most all of .NET except the windows Win32 API (eg HANDLE, PVOID, etc are all part of Win32 API) are portable

Thanks

have to rewrite a lot of code

Well if it’s for your own it’s would be a really good development project

Which training should I do to be able to programming a DPI for 100gbps