Can i use Allegro as a GUI? If so any resources to learn Allegro?

If you rach the point where you wonder about that use SDL2 instead

If you rach the point where you wonder about that use SDL2 instead

I just visited their site and it was all about making games. But I wanna build a simple quiz platform and I need a simple GUI like tkinter .

sizeof is a presude operator , means that compiler will replace the sizeof operator with type's size in compile time, rather than runtime. is it right?

Can i use Allegro as a GUI? If so any resources to learn Allegro?

Allegro: https://liballeg.org/docs.html SDL2: https://wiki.libsdl.org/ Generally 2D drawing libraries are used for games, but they can be used for GUI just fine. SDL2 suit better that duplicity and has better tools for displaying text

Allegro: https://liballeg.org/docs.html SDL2: https://wiki.libsdl.org/ Generally 2D drawing libraries are used for games, but they can be used for GUI just fine. SDL2 suit better that duplicity and has better tools for displaying text

Ohk

sizeof is a presude operator , means that compiler will replace the sizeof operator with type's size in compile time, rather than runtime. is it right?

Yes

Hi guys. I'm using Qt5 c++ to create Dashboard user panel. I want to change a background of a button when it's selected until I click in another button. I had a look to a Qt documentation, but I didn't find such signal in QPushButton nor in QAbstractButton. Anyone has an idea of how to do it?

Any...?

Hi guys. I'm using Qt5 c++ to create Dashboard user panel. I want to change a background of a button when it's selected until I click in another button. I had a look to a Qt documentation, but I didn't find such signal in QPushButton nor in QAbstractButton. Anyone has an idea of how to do it?

No idea, don't use QT

No idea, don't use QT

Why? What you recommend? It's a destop application

Why? What you recommend? It's a destop application

C#, not C++

Why? What you recommend? It's a destop application

If you want Native and free, than Pascal (Lazarus).

Hello guys

Helloooooo

C#, not C++

I didn't learn these languages (neither C# nor Pascal) May be I should try other design.

Thank for helping

Helloooooo

How are you doing

I didn't learn these languages (neither C# nor Pascal) May be I should try other design.

Well C# isn't much different but don't try to do GUI frontend in C++... learning C# isn't too hard.

Well C# isn't much different but don't try to do GUI frontend in C++... learning C# isn't too hard.

why not to use C++ ?

why not to use C++ ?

No garbage collector... pointers pointers everywhere.

No garbage collector... pointers pointers everywhere.

ok, nice to know..

Well C# isn't much different but don't try to do GUI frontend in C++... learning C# isn't too hard.

,, 👍

yup

How to write pseudocode of simple calculator?

Almost same as algorithm?

How to write pseudocode of simple calculator?

search online...

https://pastebin.com/eEp7jL6a

uhh your code is so hard to read. You've created a main function inside of a main function? Why? anyway, about ur problem: in lines 15 and 16 you declare start and help functions inside the main. No problem. That time the are non static. But when you redeclare them inside your main, they are defined as static by the compiler (at least is what i think?), so they cannot be accessed by external functions. A solution would be to remove the lines 15 and 16 and move all your help and start functions to the head of the function they are defined in. (the concepts may be wrong and if someone could correct me would be great. But the solutions works)

No garbage collector... pointers pointers everywhere.

VLC and other great GUI applications were written in cpp. I guess there is some way to handle these issues.

is it possible to convert the contents of the uint32 pointer to a string?

is it possible to convert the contents of the uint32 pointer to a string?

using itoa function

VLC and other great GUI applications were written in cpp. I guess there is some way to handle these issues.

Who said there isn't? And who says C++ isn't the best, but if you want to do things easily and you're already using QT, then use .NET and C#

Hi guys. I'm using Qt5 c++ to create Dashboard user panel. I want to change a background of a button when it's selected until I click in another button. I had a look to a Qt documentation, but I didn't find such signal in QPushButton nor in QAbstractButton. Anyone has an idea of how to do it?

You can try qml for UI if using qtcreator. It is way easier.

what kind of projects can i do with c?

what kind of projects can i do with c?

kernel for example

what kind of projects can i do with c?

printf, scanf and +/-* and maybe pow

just hat jeje

just hat jeje

You actually can do anything in C, but depends on what you really want to do, your knowledge, your skill with C and experience...

ok, well i want to learn more about, but when i want to find information everybody just tech you the basics

ok, well i want to learn more about, but when i want to find information everybody just tech you the basics

Because that is what you should do practically in C, don't even think about doing something complex, because it'll take you months to do something, which will take you 2 hours to do in other easier programming languages and maybe a day in C++

oh ok, so do you recommend me c++

oh ok, so do you recommend me c++

For what?

It depends on what you want to do, everything has it's advantages and disadvantages, if you want to write a broker, I wouldn't recommend C++ or C.

for example if i want to build an OBS something similar

Im new in c so sorry for my questions

Open Broadcast Software?

yes

yes

You can use C++, you can use C# or you could use other tools that you're comfortable with

C++ will give you speed but add headache, C# will reduce the speed but make development easier...

oh ok, so C is recommend for microchips

oh ok, so C is recommend for microchips

I don't use C with Microcontrollers either, I use C++, because these days everything uses string and C doesn't have any real string.

yeah I see it ejej

yeah I see it ejej

ejej? What does that mean?

jeje is like a friendly smile

where are you from?

Talk C/C++ please.

ok

How to write pseudocode of simple calculator?

Actually IDK... 🤷‍♂️

Hello everyone Can i ask if there is any group like this group for Java ? Could i ask about something in Java here ?

Hello everyone Can i ask if there is any group like this group for Java ? Could i ask about something in Java here ?

I'have one, but is in spanish

Hello everyone Can i ask if there is any group like this group for Java ? Could i ask about something in Java here ?

Are you interested?

Are you interested?

Unfortunately, i cannot speak Spanish😢

Unfortunately, i cannot speak Spanish😢

ou... well. 🤷‍♂️

Hello everyone Can i ask if there is any group like this group for Java ? Could i ask about something in Java here ?

#ot no, ask in the offtopic group

Is there any projects for C language for student level?

You can try qml for UI if using qtcreator. It is way easier.

I think this way would be what I need now. Later, may be taking some times to explore C# as suggested @Tazmikar. Thanks guys

Does it make sense to allocate memory for class fields if objects are created dynamically?

class A { int a; }; or class A { int *a; public: A() { a = new int; } }; // when I have int main() { A *b = new A; delete b; return 0; }

Does it make sense to allocate memory for class fields if objects are created dynamically?

Generally, it depends. If your field is only used inside the class there is no need to create it dynamically. In your second example you should also define the destructor to avoid memory leaks.

I did not specify a destructor, because I portrayed the class purely for example

class A { int a; }; or class A { int *a; public: A() { a = new int; } }; // when I have int main() { A *b = new A; delete b; return 0; }

In your second case, if you dont allocate memory for the int* member field inside the constructor, memory wont be allocated for that field (as in the pointed to memory) even if the object of that class is dynamically allocated

So, in larger projects I still have to allocate memory for the class fields?

So, in larger projects I still have to allocate memory for the class fields?

If your class member fields need dynamic allocation, then you must allocate memory for them irrespective of whether objects of that class are dynamically allocated or not. Btw start using smart pointers.

I understand that for "a" memory won't be allocated in case if my object is dynamically allocated. The main idea of ​​my question is exactly in which cases I should allocate memory for class fields, whether it is necessary to do it.

or it depends..

I understand that for "a" memory won't be allocated in case if my object is dynamically allocated. The main idea of ​​my question is exactly in which cases I should allocate memory for class fields, whether it is necessary to do it.

That depends on the use case like @ollirz said.

Ok, thanks )

I understand that for "a" memory won't be allocated in case if my object is dynamically allocated. The main idea of ​​my question is exactly in which cases I should allocate memory for class fields, whether it is necessary to do it.

to be pedantic, by creating an instance of the class you do also allocate memory for a. In fact, the second class is likely to be bigger than the first one because a pointer (int*) is probably bigger than your integer int. However, only in the first instance you do allocate / create an int by default. e.g. #include <cstdio> struct A { int a; }; struct B { int *a; }; int main() { printf("sizeof(A): %u\n", sizeof(A)); printf("sizeof(B): %u\n", sizeof(B)); return 0; } prints Program returned: 0 sizeof(A): 4 sizeof(B): 8 If your questioning whether you should have allocate a field dynamically you probably shouldn't, otherwise you would know. An example for a dynamic field is std::string, you don't know how big the string is going to be so you need to make sure you allocate enough space in the constructor, there is no way of knowing ahead of time.

I got it, thank you

/get

I'm sorry

Hye

Has anyone experienced this error? configure: error: --with-tls=yes was specified but no compatible TLS libraries could be found.