Unfortunately it's not that easy
Seriously?
Anonymous
Anonymous
Will I have to understand machine code to work out certain high level bugs or is C++ sufficient?
Mar!o
Seriously?
There is generally a huge difference in interpreted languages (scripting) (JS, Python)
and AOT compiled languages like C, C++ or Rust
there even is something in between like java or C#
Anonymous
There is generally a huge difference in interpreted languages (scripting) (JS, Python)
and AOT compiled languages like C, C++ or Rust
there even is something in between like java or C#
Okay I'm beginner so I'm still not that into it. I just want to make sure I get the process before I move on
Anonymous
I will get it soon enough hopefully
Mar!o
Will I have to understand machine code to work out certain high level bugs or is C++ sufficient?
No.
There also is a difference between assembly and machine code.
Machine code is just a byte array filled with instructions and data.
Assembly is like a human understandable text version of that.
An assembler "compiles" these text instructions into machine code.
Understanding assembly will help with some bugs and optimization but is not necessary.
It's more important that you understand the C++ concepts.
Knowing machine code is needed for three major things:
1. Hacking (reverse engineering)
2. Building compilers, assemblers
3. Building CPUs
Anonymous
No.
There also is a difference between assembly and machine code.
Machine code is just a byte array filled with instructions and data.
Assembly is like a human understandable text version of that.
An assembler "compiles" these text instructions into machine code.
Understanding assembly will help with some bugs and optimization but is not necessary.
It's more important that you understand the C++ concepts.
Knowing machine code is needed for three major things:
1. Hacking (reverse engineering)
2. Building compilers, assemblers
3. Building CPUs
Guess machine code won't do anyone much good then unless they're a software engineer or something
Mar!o
Guess machine code won't do anyone much good then unless they're a software engineer or something
No - raw machine code bytes are not used often today.
Assembly sometimes:
movq %rbp, %rsp
but not the machine code:
0x48 0x89 0xe5
Anonymous
Well good bye
Stefano
can you help me?: https://pastebin.com/9MzPRS3a
Stefano
I have to realize the function I wrote at the bottom
Tahmedur
Hi what kind of problem is that in vs code
'ISO C++ Forbides converting a string constant to char*'
Anonymous
So what is the difference between ~ and ! operators?
Pavel
So what is the difference between ~ and ! operators?
! is logical operator, ~ is bitwise
First applies to bool and returns bool, the second applies to integers and returns integer (if I recall correctly).
Try std::cout << (~5); and std::cout << (~(~5));
Vlad
Hi what kind of problem is that in vs code
'ISO C++ Forbides converting a string constant to char*'
Do not assign string literals to char*
Precious M
Please I need developer assistance in a custom php project
Diego
Php would be off topic in this group, sorry
Try to find a php group like you found this one
Precious M
MAC
🌳 PHP
@phpgeeks @phpgeeksjunior
@phpclubru @prophp7 @codeidua
🌿 Laravel
@laravel_pro @laravelrus
🌿 Yii
@yii1ru @yii2ru @yii3ru
🌿 Symfony
@symfony_php @symfony_ru
👨🏼💻 Работа
@php_jobs @yiijobs
AHMED
any arr[]={5, 3.2, "awesome"};
AHMED
Is the above code valid?
AHMED
If so, how to access arr[0];
Precious M
Hanz
MAC
Array of type any to hold variables of different types. DOES it exist?
There aren't in pure c/c++, but you can create or use a library
AHMED
And is there a container to hold values of different types?
MAC
And is there a container to hold values of different types?
#include <iostream>
using namespace std;
struct {
//all types you need
int a;
double c;
}array;
int main(int argc, char *argv[])
{
array myarray[size];
}
robherc
Hello, I'm writing functions to perform binary roll operations on different sized integers in C.
Right now, I'm working with 8-bit variables (uint8_t/unsigned char) and I can successfully RoL from 0-8 positions, but for positions 9-31 (yes, I've tried modulo-dividing by 8nfor the shift distances, but get the same results) I'm encountering errors I can't figure out in testing (RoR only works on positions 24-32).
Is anyone willing/able to help me with this?
robherc
Array of type any to hold variables of different types. DOES it exist?
You could use an array of pointers; then just "load" the array with pointers to variables of whatever type you need.
...then your next problem becomes reading the data back out of the array. You'll have to have some way of knowing what type of data each pointer is "pointing" to. (Something similar to how "printf" works in C may be applicable here)
robherc
Hello, I'm writing functions to perform binary roll operations on different sized integers in C.
Right now, I'm working with 8-bit variables (uint8_t/unsigned char) and I can successfully RoL from 0-8 positions, but for positions 9-31 (yes, I've tried modulo-dividing by 8nfor the shift distances, but get the same results) I'm encountering errors I can't figure out in testing (RoR only works on positions 24-32).
Is anyone willing/able to help me with this?
nevermind. I spent 6+ hours tearing my hair out today, and 2 minutes ago I finally noticed that I had been using the original (non modulo-divided) move distances in one part of my function....of course, AFTER I posted in here and embarrassed myself by publishing my stupidity publicly 😂
Asad
If so, how to access arr[0];
Here is the C++ example:
#include <any>
#include <iostream>
int main()
{
std::any arr[] = { 5, 3.2, std::string("awesome") };
std::cout << std::any_cast<int> (arr[0]) << std::endl;
std::cout << std::any_cast<double> (arr[1]) << std::endl;
std::cout << std::any_cast<std::string> (arr[2]) << std::endl;
return 0;
}
Rubens
Good evening everyone
I am developing a project, in which, via GPS location, with a Compass Arduino module. Toy car can move inside a house just by pre-programming its movement, I've been researching for a while on ways to do this, I thought about doing a Path planning, but I don't know if I can do it on Arduino or esp32. Can someone help me ? I'm doing this project for a competition, if someone can help me or give me a tip I will thank you very much. I don't have much knowledge of the area, but I'm looking forward to seeing this project working. Thank you very much in advance
Asad
AHMED Here is the C version:
https://pastebin.com/SkddSwPS
Aakash
Hi what kind of problem is that in vs code
'ISO C++ Forbides converting a string constant to char*'
#include <iostream>
#include <string>
int main() {
{ /////__problem__
std::string strXX = "good string-XX..";
char const *chrXX = strXX.c_str();
strXX = "bad string-XX..";
std::cout <<"\n" << chrXX;
}
{ /////__problem-fix__
std::string strYY = "good string-YY";
auto const chrYY = [strYY]()->char* {
return (char*)strYY.c_str();
};
strYY = "bad string-YY..";
std::cout <<"\n" << (char *)&chrYY;
}
return 0;
}
🙃
Anonymous
Gabo Islas:
Algún canal o documentación para estudiar análisis de algoritmos desde la teoría?
Escucho sus respuestas
Saludos
Igor🇺🇦
Anonymous
Any channel or documentation to study algorithm analysis from theory?
I listen to your responses
Greetings
Asad
Any channel or documentation to study algorithm analysis from theory?
I listen to your responses
Greetings
Get yourself CLRS book. It is theory-heavy.
Anonymous
Ok thanks you
Anonymous
Thanks
Mar!o
I want to play with the features 😊
Sure 😊 and if you write C and don't have std::tuple write a discriminated union
Mar!o
the idea is:
enum Type {
Int = 0,
Float = 1,
Ptr = 2
};
struct Entry {
union {
int i;
float f;
void* p;
} values;
enum Type type;
};
Asad
Looks good to me
MAC
Asad
But only for C in C++ use tuple or variant
Of course. I thought about an array of std::any, but, std::tuple have just better syntax 👍
MᏫᎻᎯᎷᎷᎬᎠ
.
Anonymous
Anonymous
Of course. I thought about an array of std::any, but, std::tuple have just better syntax 👍
they are for different purposes
Asad
What is the purpose of std::any?
Asad
Just answer
Asad
It is to hold any type of data. So, what is so funny?
Aakash
It is to hold any type of data. So, what is so funny?
Take it easy! ..eagles.
Here’s the poetic explanation to your concern..
Thy work by
Char* is to Std:String,
Int* is to Std:Vector,
Or,
C is to C++,
Thy love remains for..
Void * is to Std:Any
🙃
Anonymous
std::string is a more advanced char pointer, similar to String in java, and all String Literals in C++ are automatically assignable/convertable to std::string (i think)
const char * literal = "string literal";
std::string literal = "string literal";
std::string string = std::string("string literal");
std::vector is basically a linked list implementation in C, except WAY more complete, and automatically expandable
undernieth it uses a normal C pointer which is publically accessable vis the data member
// vector with 5 elements, still resizable
std::vector<int> intVector = std::vector<int>(5);
// array with 5 elements
int intArray[5];