just gonna make this a thread for any time I complain about smth my prof is doing/saying
mute this thread if you don't wanna see it
1
0
0
p1 = new int;
What.
stop. now.
1
0
1
"dangling pointers"
this is why you use smart pointers :)
1
0
1
not from my prof but from cppreference.org
double* p = new double[]{1, 2, 3}; // creates an array of type double[3]
auto p = new auto('c'); // creates a single object of type char. p is a char*
auto q = new std::integral auto(1); // OK: q is an int*
auto q = new std::floating_point auto(true) // ERROR: type constraint not satisfied
what the fu-
why does it allow this.
1
0
0
Show content
also, my assignment has incredible requirements like:
All data members of user-defined class type must be of pointer type.
he explained this as "any data member and any variable and any assignment has to be pointers"
like. What.
1
0
0
Show content
or
All classes must implement a correct copy constructor, assignment operator, and stream insertion operator
like. what. why does it need an assignment operator (not a move constructor???) and a stream insertion operator.
using std::cout is cringe, use fmt::print/fmt::println (or std::print/std::println (or a logger which uses either of these)) and then implement a custom formatter.
also, not Everything needs a way to be formatted to stdout....
1
0
0
Show content
copy constructor is reasonable tho
but without a move constructor, the compiler won't be able to optimize things as well, but whatever
1
0
0
Show content
https://gustedt.wordpress.com/2025/01/06/simple-defer-ready-to-use/
hmmm
https://gustedt.wordpress.com/2026/02/15/defer-available-in-gcc-and-clang/
hmmmmmmm
I mean like. not the most convenient, buuuuttttt
1
0
0
Show content
why does he even need to explain
const int * const x = &foo;
this is quite easy to understand. constant pointer to a constant value. that is literally just how you read it?? why does this need an explanation??
1
0
0
Show content
void increase (void* data, int psize){
if ( psize == sizeof(char) ){
char* pchar; pchar=(char*)data; ++(*pchar); }
else if (psize == sizeof(int) ){
int* pint; pint=(int*)data; ++(*pint); }
}
unless I'm mistaken, according to the spec sizeof(char) can equal sizeof(int) (though, in practice, there are not really any systems where this is true, afaik)
also, I have not adjusted the formatting from the lecture notes presentation pdf. that's just exactly what he wrote
1
0
0
Show content
it seems that Texas Instruments C54x DSPs have 16 bit chars, I wonder if they use 16 bit ints? a quick search only gave me datasheets and I'm too lazy to look into it further
1
0
0
Show content
yeah it seems there are some DSPs where this is the case
Apparently, this one has 32-bit char, and, as a consequence,
sizeof(int)==sizeof(char)==1
1
0
0
Show content
>section in the notes titled "smart pointers"
>arrives at it
>"so we're not going to talk about smart pointers. we're going to skip this section"
NOOOOO
1
0
0
Show content
Pass by value cannot accept a parameter that is an expression.
...what?
1
0
0
Show content
By Reference:
- Drawback: cannot pass NULL , as a reference cannot be NULL
what? how is this a drawback? this is a good thing?
and if you need an optional value, std::optional exists
1
0
0
Show content
for the pass by value, is he thinking of pass by reference..?
because iirc if you initialize struct or whatever passed to smth that takes a reference, iirc the reference will go out of scope and not be valid (I could be misremembering this)
1
0
0
Show content
C++ provides following two types of string representations:
- C-style character strings
- string class type introduced with Standard C++
wrong! a char array is not a string. it is a char array.
1
0
0
Show content
Many libraries would define their own string type
back in like the fucking 90s?
ignoring glib (& any libraries that need a string with known length at compile time for funny template stuff), basically everyone just uses std::string (at least afaik, I could be mistaken, but I don't see it that often)
well, maybe some really large projects have their own string type. like I could see chromium doing that or smth
2
0
0
Show content
using namespace std;
STOPPPPP
1
0
0
Show content
I have another prof who actually knows what he's doing tho for a course where we look at multiple different languages (starting with C, then python, then clojure, then erlang)
1
0
0
Show content
NOOOOOO he mentioned make, said "the syntax is really obscure so usually we use a generator", then mentioned cmake and didn't mention something better like meson </3
(though he did say we're not going to be using either, and instead just invoking the command directly)
1
0
0
Show content
"when printing to a stream you can use the c-style \n or you can use std::endl"
do not use \n, it doesn't flush the stream...
1
0
0
Show content
he asks what the difference is between \n and std::endl
I respond that it flushes the stream
he says "no"
?????
that is LITERALLY what the difference is?
1
0
0
Show content
I have cppreference open right now. it literally says
Inserts a newline character into the output sequence
osand flushes it as if by callingos.put(os.widen('\n'))followed byos.flush().
what.
1
0
0
Show content
he just said that calling .open() on ofstream will cause the file to be locked
I don't think that's the case..?
but I could be wrong about that one
1
0
0
Show content
I think with pointers you usually define them with, uh, a star sign
(mind you, this was a TA and they probably mispoke, I just found it funny that they said "usually" here lol)
1
0
1
Show content
oh boy, time to learn what a struct and a class is!
1
0
0
Show content
(talking about header files in C++)
As opposed to Java classes, C++ allows to have class declarations that do not include the definition of the functions it encapsulates.
This enables the possibility to separate the class declaration from its implementation code, which provides the implementation of the member functions of a class.
I mean.. I guess it provides that possibility?
you can do this in java already with an interface though...
but like.. the main reason header files exist is because they come from a time when computers weren't powerful enough to be able to hold everything in memory and do multiple passes during the compilation process. they weren't really added for the purpose
1
0
0
Show content
I love learning about what arraylists are
1
0
0
Show content
??? my teacher just claimed that in java, ArrayList has a method .get(integer i)
no? integer is not a class that exist? the signature is #get(int)
1
0
0
Show content
why the fuck are we calling everything an "ADT"
1
0
0
Show content
in C++ they don't have an array list, they have something called vector
?????
in C++, std::vector is an array list??
1
0
0
Show content
how are we managing to explain linked lists in a way that is confusing
1
0
1
Show content
That is, in a list, each position b will always be after a position, a, and before a position c, except when b is the first or last position in the list
that is... a property of any finite sequence of integers?
1
0
1
Show content
favourites list ADT
what?
1
0
0
Show content
are we just making shit up now
1
0
0
Show content
he is explaining how this might be used with an example of a GUI which has a dropdown menu with 20-30 entries
his suggestion is that the application should track how often each menu item is pressed, and then only show the top 5 most pressed items
???
1
0
0
@solonovamax deadass HORRIBLE ux design ðŸ˜
things should be kept at fixed positions!
0
0
0
Noisytoot
noisytootShow content
@solonovamax IVAN uses its own string type for some reason (in C++). Also, a null-terminated char array is a string, otherwise C doesn’t have strings.
1
0
1
Show content
@noisytoot imo C doesn't have strings, it has char arrays
char array != string
1
0
0
Noisytoot
noisytootShow content
1
0
0
Show content
0
0
0