I've made a very simple and primitive JavaScript canvas engine that is simply not dependent on time, as in it assumes that t = 1 in the formula v = u + at - v is the current velocity, u the initial velocity and a is acceleration due to gravity.

Now, the issue with this method is that if the value of gravity, or velocity is large enough that the object it should collide, it just goes right through it. Now, I have been told that if time was a parameter, we could just increase the frame rate and dilate the time to resolve this, but this would mean that the engine would no longer be deterministic - as in, the simulation would not work out the exact as it we assumed it to be, owing to hardware and software requirement like decimal point handling and precision.

How can we deal with this issue on this simple deterministic engine, and improve collision detection?

So far, I've followed a simple Tor interceptor tutorial on YouTube, while strictly adhering to C2x with every warning flags enabled - not that it is the optimal way to go about learning the language.

I may have, or may not have inadvertently used improper C2x, but I've used typedef aggressively to slightly mimic Golang.

Almost a year ago, I had blindly translated a C++ Vulkan tutorial to C, and I didn't understand a single thing about anything graphics-related - framebuffer, swapchain, etc.

Now that I am learning it again from scratch, I also wanted to know what to learn next, as well as some of the job opportunities that I can explore.

RINA offers a lot of

For starters, since I am on LibreWolf, I have WebGL disabled, meaning that my browser does not support slow, performance-tanking 3D renders, at the cost of breaking them. Now, this is just a positive side-effect as an effort to disable WebGL fingerprinting - if the website is broken, I don't even bother using them.

I want to stop supporting websites that are performance-heavy and unnecessarily bloated, so that I can show solidarity with folks who are unbeknownst victims to the digital divide, and discourage enshittification of the internet. Any websites that helps with this?

I am reading data through a socket connected to a proxy, which in turn connects to a website of a choice, based on the IP and port I've assigned. After the successful connection, I am supposed to start sending headers to the server I've successfully connected to:

```c ... char *request_header = "HEAD / HTTP/1.0\r\n";

int response_size = 512; char *response_header = malloc(response_size * sizeof(char));

write(proxy_fd, request_header, strlen(request_header)); read(proxy_fd, response_header, response_size);

printf("Response header:\n%s\n", response_header); free(response_header); ... ```

Now, creating a statically-allocated string array is problematic, because the response header can have any size. Is there a way to dynamically allocate the string response_header?

Inside <arpa/inet.h>, there are two functions to convert host byte order to network byte order. Why are there two options? I understand that htons() is used for port address related to IPv4 and IPv6, but what use does htonl() serve?

When I try running GNU indent on this particular code snippet:

c #include <stdio.h> #include <stdlib.h>

Nothing happens? Why isn't indent dealing with the irregular space between #include and <stdio.h>?

cross-posted from: https://lemmy.ml/post/21033409

> In the book authored by K.N.King, there's this example: > > ::: spoiler viewmemory.c > > c > /* Allows the user to view regions of computer memory */ > > #include <stdio.h> > #include <ctype.h> > > typedef unsigned char BYTE; > > int main(void) > { > unsigned int addr; > int i, n; > BYTE *ptr; > > printf("Address of main function: %x\n", (unsigned int) main); > printf("Address of addr variable: %x\n", (unsigned int) &addr); > printf("\nEnter a (hex) address: "); > scanf("%x", &addr); > printf("Enter number of bytes to view: "); > scanf("%d", &n); > > printf("\n"); > printf(" Address Bytes Characters\n"); > printf(" ------- ------------------------------- ----------\n"); > > ptr = (BYTE *) addr; > for (; n > 0; n -= 10) { > printf("%8X ", (unsigned int) ptr); > for (i = 0; i < 10 && i < n; i++) > printf("%.2X ", *(ptr + i)); > for (; i < 10; i++) > printf(" "); > printf(" "); > for (i = 0; i < 10 && i < n; i++) { > BYTE ch = *(ptr + i); > if (!isprint(ch)) > ch = '.'; > printf("%c", ch); > } > printf("\n"); > ptr += 10; > } > > return 0; > } > > ::: > > For some reason, when I try to enter addr variable address as the parameter, it has a segmentation fault error. However, in the book's example and the screenshot from this site in Hangul, there's no such error? > > When I try using gdb to check the issue, here's what I get: > > :::spoiler gdb > console > $ gdb ./a.out --silent > Reading symbols from ./a.out... > (gdb) run > Starting program: /home/<username>/Desktop/c-programming-a-modern-approach/low-level-programming/a.out > [Thread debugging using libthread_db enabled] > Using host libthread_db library "/gnu/store/zvlp3n8iwa1svxmwv4q22pv1pb1c9pjq-glibc-2.39/lib/libthread_db.so.1". > Address of main function: 401166 > Address of addr variable: ffffd678 > > Enter a (hex) address: ffffd678 > Enter number of bytes to view: 64 > > Address Bytes Characters > ------- ------------------------------- ---------- > > Program received signal SIGSEGV, Segmentation fault. > 0x000000000040123a in main () at viewmemory.c:31 > warning: Source file is more recent than executable. > 31 printf ("%.2X ", *(ptr + i)); > (gdb) > > ::: > > What is going on? By the way, I am using Guix, if that matters in any way. Here's the output for ldd: > > :::spoiler ldd > console > $ ldd ./a.out > linux-vdso.so.1 (0x00007ffecdda9000) > libgcc_s.so.1 => /gnu/store/w0i4fd8ivrpwz91a0wjwz5l0b2ralj16-gcc-11.4.0-lib/lib/libgcc_s.so.1 (0x00007fcd2627a000) > libc.so.6 => /gnu/store/zvlp3n8iwa1svxmwv4q22pv1pb1c9pjq-glibc-2.39/lib/libc.so.6 (0x00007fcd2609c000) > > :::

In the book authored by K.N.King, there's this example:

For some reason, when I try to enter addr variable address as the parameter, it has a segmentation fault error. However, in the book's example and the screenshot from this site in Hangul, there's no such error?

When I try using gdb to check the issue, here's what I get:

What is going on? By the way, I am using Guix, if that matters in any way. Here's the output for ldd:

Second representation requires at least 6 bits to represent numbers between 0 to 59. But 5 bits are not just enough - 2<sup>5</sup> = 32, which can only represent from 0 up to 31 seconds.

According to K.N. King:

>You may be wondering how it 's possible to store the seconds - a number between 0 and 59 in a field with only 5 bits. Well. DOS cheats: it divides the number of seconds by 2, so the seconds member is actually between 0 and 29.

That really makes no sense?

It looks very similar to scope, so I really don't understand the difference. What makes storage classes different from each other? How is auto not the same as static, extern or register?

In my journey to learning C, I've come across header files, which are used to (I'm assuming) define a prototype for the source file, as well as structure modules. This feature, in my opinion, is pointlessly not just redundant, but possibly a source for pitfall. The same information can probably be extracted from the source code, if not for the restrictions of the language specification in C.

Say, if I have a GTK project, I will have to use the preprocessor directive, that will require the use of GTK headers that look something like #include <gtk/gtk.h>, and they're usually in the system path. How do modern languages, like Rust, Zig or Go deal with this situation, where shared libraries are used?

From the Deutsche Welle's "Learn German" web-app, there's a second part to completing A1 level, called the "Nicolas Weg". Here's the question from the last form page:

1. Hi, wie geht's?

   (Say "hello" and thank them for asking, say that you are doing well. Afterward ask how the person is doing.)

   Their answer: Hallo! Danke, gut. Und dir?

   My answer: Hallo! Danke, es geht gut. Und dir?

2. Guten Morgen, wie geht es Ihnen?

   (Greet them and say that you are not doing too well.)

   Their answer: Guten Morgen, es geht mir nicht so gut.

   My answer: Guten Morgen, es geht nicht so gut.

3. Guten Abend.

   (Reciprocate the greeting and formally ask how the other person is doing.)

   Their answer: Guten Abend, wie geht es Ihnen?

   My answer: Guten Abend, wie geht's Ihnen?

Apart from that, I also have a few doubts:

• I understand that Ihnen and dir are used in formal and casual occasions. But what about the case when both are avoided? If "Wie geht's?" is grammatically correct, then would that also be the same for the non-contracted form, "Wie geht es?"

• I was wondering as to when the word "mir" should be used? Why not "mich" or "ich"?

• And what about "Morgen", instead of "Guten Morgen"?