Ok, but in there, the opponent computer computes all possible combinations to traverse through the most efficient tree to win the game. https://en.m.wikipedia.org/wiki/Minimax

then yes, it's (kinda) like that

How to make pair of elements in a array and find element with no pair in c++ ? Answer I found about this was using bitwise xor operator but I can't understand how , can someone help me ?

How to make pair of elements in a array and find element with no pair in c++ ? Answer I found about this was using bitwise xor operator but I can't understand how , can someone help me ?

Take example and try to understand

how to return an array and assign to an array in main function

how to return an array and assign to an array in main function

you usually don't want to copy whole array, you just allocate it, put your values and hand over the array pointer to main

can anyone tells me what is the problem in this

Any one have OOP notes C++

Any one have OOP notes C++

Yes I have

Which one? I have no record or such action

Yes I have

Please give me

How can I start learning C++ from beginning

practice, don’t take courses

i mean the github and everything is fine... just don't post wall of code...

it's fine to use pasting services like i have shown above

Hey,i nub in c++ and i spent a some many hours in this question,but i dont answer this. Error LNK2001 unresolved external symbol _memset. code - https://pastebin.com/E7e8W04G

Hey,i nub in c++ and i spent a some many hours in this question,but i dont answer this. Error LNK2001 unresolved external symbol _memset. code - https://pastebin.com/E7e8W04G

perhaps if you spent less time writing on asses and more time getting acquainted with the basics of how a linker works you would have found out you probably are missing your libc dll

I have a problem in the creation of linked list this and I just enter a number form the user and it doent continue

I have a problem in the creation of linked list this and I just enter a number form the user and it doent continue

Share the code

I think you can do s(this->j[0], 40);

You can also use std::distance to find distance between pointers https://en.cppreference.com/w/cpp/iterator/distance

Does every container inherit from a common type in c++? If not, how am I supposed to pass any iterable type as a function parameter?

Does every container inherit from a common type in c++? If not, how am I supposed to pass any iterable type as a function parameter?

They do not, one way you can do that is to use the type-erasure design pattern

They do not, one way you can do that is to use the type-erasure design pattern

thx

In my work I use something similar to that with a bunch of concepts that work like C# Linq

Cpp2 here we go https://www.youtube.com/watch?v=ELeZAKCN4tY

Anyone who got somewhat familiar with Carbon, how different this is to what Carbon proposes?

#paste

Hello, I'm learning C++ at the university, and I need help with this code. When I run it, it shows me 2 errors: 'add' was not declared in this scope and 'substract' was not declared in this scope. Maybe you will find it something stupid, but for me it's quite difficult. https://hastebin.com/nowayovige.cpp

thanks in advance

i aspirant Don't message or even call anyone without permission. These are the basic ethics.

https://hastebin.com/povegefizu.cpp

https://hastebin.com/povegefizu.cpp

can anyon explain what happens in nibble = array[i] -‘A’ + 10;

The program is supposed to convert hexadecimal digits into decimal digits

hi is there anyone interesting in c project

hi is there anyone interesting in c project

whats the project about

i mange to get a c test with its solution

its a test from the school 1337 in morocco

its the same as schools 42 in all around the world

i did understand some part of it

maybe you should message me about this and not clog up the channel

but most of it was new to me even i have finish a lot of tutorial about c and c++ and i can write function with gui

ok xD

can anyon explain what happens in nibble = array[i] -‘A’ + 10;

why does it add 10 to it in the conversion. That is what i do not understand

If you encounter any alphabet it will convert it to integer and then add 10 to it

why does it add 10 to it in the conversion. That is what i do not understand

Because A=10,B=11 so on in hexadecimal

Because A=10,B=11 so on in hexadecimal

yes but that doesnt make a lot of sense

10 is hardcoded into the program

and not dynamic

yes but that doesnt make a lot of sense

Refer to ascii table you'll get the idea

ok i will take a look

i aspirant Don't message or even call anyone without permission. These are the basic ethics.

just for fun.thanks

Refer to ascii table you'll get the idea

can I dm you? It’s doesnt add up.

Hello i have a program that when i compile it using x86 it works fine but when i use x64 i figure out that it has different results , i hope it's ok for mention it here. I need to know what is going on cause first time i see this. More specific , the char buffer have different results. I will do some more test later using different compilers and IDEs.

can I dm you? It’s doesnt add up.

If you have given hexa number like hexa_number = 'F' then you want to convert into decimal using formula hexa_number - 'A' + 10 F in decimal format is 15 and in ascii code is 70 - ascii code of 'A' is 65 in hex code 'A' is 10 So then : result = 70 - 65 = 5 + 10 = 15; That is mean that decimal format from hex format 'F' is 15

What format specifier in C can be used to print out the following: "RAM0"

%c

Hi I'm trying to make my own database system from scratch, so I'm wondering how my b-tree should be mapped on the disk and how can I optimise it according to it's block size

Hi guys

[ 40%] Linking CXX executable main /usr/bin/ld: CMakeFiles/main.dir/main.cpp.o: in function `main': main.cpp:(.text+0x20): undefined reference to `EventTranslator::EventTranslator()' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/main.dir/build.make:97：main] 错误 1 make[1]: *** [CMakeFiles/Makefile2:100：CMakeFiles/main.dir/all] 错误 2 make: *** [Makefile:91：all] 错误 2 aurora@aurora-XiaoMai-Series:~/Source/linuxevent$ ^C aurora@aurora-XiaoMai-Series:~/Source/linuxevent$

why

# event cmake # Sets the minimum version of CMake required to build the native library. cmake_minimum_required(VERSION 3.18.1) # Declares and names the project. project("event_proxy") set (header) set (source) list (APPEND header Devices.h EventTranslator.h) list (APPEND source Devices.cpp EventTranslator.cpp) #aux_source_directory(. DIRS) set (all_files ${header} ${source}) add_library(event_proxy SHARED ${all_files})

root:

cmake_minimum_required(VERSION 3.18.1) project("main") add_subdirectory(event) add_executable( main main.cpp ) target_include_directories(event_proxy PUBLIC event)

cmake_minimum_required(VERSION 3.18.1) project("main") add_subdirectory(event) add_executable( main main.cpp ) target_include_directories(event_proxy PUBLIC event)

According to your cmake list files, the target main depends only on main.cpp. You have not added event_proxy as dependency for the target main. That is what is giving you the linker error Use target_link_library command to add event_proxy target as a dependency for main. PS - Your cmake files suck. No offence. But please go through Modern CMake guidelines to understand what you need to do to make it better

Hi I'm trying to make my own database system from scratch, so I'm wondering how my b-tree should be mapped on the disk and how can I optimise it according to it's block size

http://web.archive.org/web/20161221112438/http://www.toadworld.com/platforms/oracle/w/wiki/11001.oracle-b-tree-index-from-the-concept-to-internals An article on how Oracle implemented B-Trees. But remember that Oracle databases in production usually run on a bare metal system where Oracle acts as the OS and takes over hard disk accesses and knows how to tailor itto better fit the access patterns. This is not possible if you do it on a system with an intermediate OS as you have to go through the OS everytime. But the linked article should give you a good idea of how it is done.

According to your cmake list files, the target main depends only on main.cpp. You have not added event_proxy as dependency for the target main. That is what is giving you the linker error Use target_link_library command to add event_proxy target as a dependency for main. PS - Your cmake files suck. No offence. But please go through Modern CMake guidelines to understand what you need to do to make it better

Or better. Switch to Bazel or b2

when I declaring an array ... what is the last index stands for!? for example : int arr[2]; arr[0] = 5; arr[1] = 3; Now what is in arr[2] that's not allowed me to put any value else?!

when I declaring an array ... what is the last index stands for!? for example : int arr[2]; arr[0] = 5; arr[1] = 3; Now what is in arr[2] that's not allowed me to put any value else?!

Is it the whole code?

I mean, arr[2] was it something like int arr[2]; ?

when I declaring an array ... what is the last index stands for!? for example : int arr[2]; arr[0] = 5; arr[1] = 3; Now what is in arr[2] that's not allowed me to put any value else?!

You declaring an array in wrong way

I mean, arr[2] was it something like int arr[2]; ?

yes

when I declaring an array ... what is the last index stands for!? for example : int arr[2]; arr[0] = 5; arr[1] = 3; Now what is in arr[2] that's not allowed me to put any value else?!

You can't put anything in arr[2] because the location does not exist. When an array is declared as arr[2], it means that it is an array of size 2, meaning that there can only be 2 elements of that array, which will be arr[0] and arr[1].

You can't put anything in arr[2] because the location does not exist. When an array is declared as arr[2], it means that it is an array of size 2, meaning that there can only be 2 elements of that array, which will be arr[0] and arr[1].

I remember that I reed that the last index is stands for NULL , so RAM can easily know where is the array ends , so is this true or what!?

I remember that I reed that the last index is stands for NULL , so RAM can easily know where is the array ends , so is this true or what!?

If what I'm reading is correct, then this is usually applicable for an array of characters. There has to be a terminating character ('\0') at the end. When you declare it as char str[] you have to add it manually, but when you declare it as char *str it's added automatically. Someone correct me if I'm wrong

I remember that I reed that the last index is stands for NULL , so RAM can easily know where is the array ends , so is this true or what!?

As Blekhi mentioned this is true only for c-strings (which are null-terminated arrays of chars), also in case of c-string the array size is one element bigger than the string to have a space for that zero char. Other arrays and other types of strings may not have that.

Also for array of numbers it doesn't make sense at all, because 0 is a valid number

As Blekhi mentioned this is true only for c-strings (which are null-terminated arrays of chars), also in case of c-string the array size is one element bigger than the string to have a space for that zero char. Other arrays and other types of strings may not have that.

Thank you for clarifying

Also for array of numbers it doesn't make sense at all, because 0 is a valid number

Yeah

If what I'm reading is correct, then this is usually applicable for an array of characters. There has to be a terminating character ('\0') at the end. When you declare it as char str[] you have to add it manually, but when you declare it as char *str it's added automatically. Someone correct me if I'm wrong

You mane that when if I declaring an array of char the last index is for '\0' but if the array is int so there is no need for the '\0' at the last index

As Blekhi mentioned this is true only for c-strings (which are null-terminated arrays of chars), also in case of c-string the array size is one element bigger than the string to have a space for that zero char. Other arrays and other types of strings may not have that.

I got it 👍