I am good with basics of c

But I want to get more hands on experience

So that I will be able to write code well

https://www.youtube.com/watch?v=oHg5SJYRHA0

He is the best. He will never let you down.

wasup

can anybody tell me something graphics.h

can anybody tell me something graphics.h

Don't use it

we are on college project in which we supposed to use it

Don't use it

may i know why?

i know its outdated

may i know why?

There're superior alternatives for graphics, like SFML, SDL2, Qt, ImGui, OpenGL, Vulkan, GTK, WxWidgets, etc

tell me about it

will yah?

we are on college project in which we supposed to use it

If they force you to use it, okay, go on, but don't take it as the norm, because it isn't

If they force you to use it, okay, go on, but don't take it as the norm, because it isn't

okay

will yah?

I can tell you I normally use SFML, it's quite simple and gives you really good results

ok please

Just check the official documentation, you have everything that you might need there

Thanks buddy

Alright thanks again, for the comprehensive answer.

/report

/ban

Anyone from Germany

Hi all. I cant understand bitwise operators. I using example, 10 & 5 this is a return new number. what using bitwise operators? what make returned new value?

Hi all. I cant understand bitwise operators. I using example, 10 & 5 this is a return new number. what using bitwise operators? what make returned new value?

0000 0000 0000 0000 0000 0000 0000 1010 (uint32_t 10) 0000 0000 0000 0000 0000 0000 0000 0101 (uint32_t 5) ———————————————————— bitwise AND 0000 0000 0000 0000 0000 0000 0000 0000 (uint32_t 0)

yes but where i will use returned value 0?

yes but where i will use returned value 0?

Wherever you want

0000 0000 0000 0000 0000 0000 0000 1010 (uint32_t 10) 0000 0000 0000 0000 0000 0000 0000 0101 (uint32_t 5) ———————————————————— bitwise AND 0000 0000 0000 0000 0000 0000 0000 0000 (uint32_t 0)

0000 0000 0000 0000 0000 0000 0000 1010 (int32_t +10) 1111 1111 1111 1111 1111 1111 1111 1011 (int32_t -5) ———————————————————— bitwise AND 0000 0000 0000 0000 0000 0000 0000 1010 (int32_t +10)

what is 0 mean? it is not true or false. i must know returned value before?

what is 0 mean? it is not true or false. i must know returned value before?

?? 0 means 0

?? 0 means 0

-0

-0

lol

lol

Actually exists

Actually exists

not in 2's complement code

logic gate and is same this and?

logic gate and is same this and?

all ANDs are same as logic gate AND

logic gate and is same this and?

did you look at the second example?

yes

yes

here's more 0011 1010 (uint8_t 58) 0110 0010 (uint8_t 98) ————— bitwise AND 0010 0010 (uint8_t 34)

example i would use if statement true & true this is will return true i know. but i cant understand bitwise & because its result not true or false. it is return new bits value.

example i would use if statement true & true this is will return true i know. but i cant understand bitwise & because its result not true or false. it is return new bits value.

no. you use &&. if (true && true) logical AND

no. you use &&. if (true && true) logical AND

Both will work

no. you use &&. if (true && true) logical AND

but same means

Both will work

no. bitwise AND won't work on floats for example

no. bitwise AND won't work on floats for example

But booleans are not floats

But booleans are not floats

:/ bitwise AND doesn't work on booleans directly

but same means

no. f(x) && g(y) means evaluate the effect and side effects of f(x) first. check if the return value (effect) converts to 0/false. if it is, we are done and the return value is 0/false. do not evaluate g(y). if it isn't, evaluate g(y). if the return value of g(y) converts to 0/false return 0/false, otherwise return true.

f(x) & g(y) means evaluate f(x) and g(y) in an unspecified order (the side effects can occur in any order). then convert the return values of f(x) and g(y) to appropriate integers and perform a bitwise AND to produce a new integer

Hi everyone! char* response; printf(“please type something:”); gets(response); printf(“you typed %s”, response); What’s wrong with this code?

Bruh you have an empty pointer

Hi everyone! char* response; printf(“please type something:”); gets(response); printf(“you typed %s”, response); What’s wrong with this code?

You did not allocate any memory for response?

Yes you need a local array or dynamic one

I couldn’t figure it out

char response[256];

256 is the number of chars

Okay, another missing detail?

No...

Okay, another missing detail?

Try using fgets instead of just gets

Thanks :)

I just started learning dynamic memory, so I have another problem :/ int* X=malloc(3*n); int *Y=X; free(Y); Does this free the original memory? Why isn’t a pointer NULL after calling free? Thanks.

I just started learning dynamic memory, so I have another problem :/ int* X=malloc(3*n); int *Y=X; free(Y); Does this free the original memory? Why isn’t a pointer NULL after calling free? Thanks.

Yes it does free the original but free does not set it to null. Do this manually to prevents bugs like double free. That's why I always write my own small allocator/reallocator/reallocator wrapper functions...

Thanks again

Try using fgets instead of just gets

s/Try using/use/

Okay, another missing detail?

gets() has been removed from the C standard library since C11

Oh thanks

OK,thx

Hey

How can i point a 2D array with a pointer and how can manipulate the array https://paste.ubuntu.com/p/2xBhKPCgdP/

How can i point a 2D array with a pointer and how can manipulate the array https://paste.ubuntu.com/p/2xBhKPCgdP/

2d array is just pointer to a pointer

2d array is just pointer to a pointer

but i want to my array is in heap

How can i point a 2D array with a pointer and how can manipulate the array https://paste.ubuntu.com/p/2xBhKPCgdP/

why isn’t working that code?

Photo de Brief

please look at this diagram and help me to display the message corresponding to each sensor while knowing that when the 2nd sensor is active the 1st is also active and when the 3rd sensor is active the 2 others are also and so on

2d array is just pointer to a pointer

https://paste.ubuntu.com/p/54y7bPshdF/ i get seg fault error

https://paste.ubuntu.com/p/54y7bPshdF/ i get seg fault error

Sorry can't check right now

Sorry can't check right now

okay

Busy with work