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Beginners - January 2021 (Page 9)

Hello everyone. I want to ask one question. Do you know any websites where I can solve programming questions of C programming language. Because I need to prepa...

[2 replies] Last: Hello Aslanchik, I did not see this on the "vjudge" list. https://pro... (by Handy Andy)

by gevCplus

Question about a code

Hello guys! I have a question (which may be kind of not serious. Why exactly my visual studio compiler does not accept int arr (it states that expression must ...

[6 replies] Last: Thank you for your replies all. No that's ok with the dynamic programm... (by gevCplus)

by steveRoll

How to pass reference of ifstream to function that expects istream

I have a Lexer class, and one of its members is an istream reference. I chose to make it an istream in order to support any kind of input streams that inherit f...

[2 replies] Last: Ah, you're right. It seems that Visual Studio was just highlighting th... (by steveRoll)

by oksaannna

vector,array,c++

hello everyone. could anyone please tell me if writing a code this way is considered to be correct? i mean adding vector as an argument in TreeSort function, bu...

[1 reply] : T arr as a function argument is equivalent to T* arr , so yes you ... (by Ganado)

by joe809

Store Values into an Array

I'm trying to store random numbers generated from the function using a loop but I don't have any idea how to even store the values into the array from a loop. ...

[8 replies] Last: Thank you all for the help. It was very helpful and I'm actually getti... (by joe809)

by PK Dey

Constructor doesn't work

Hello! every one. The following program works #include<iostream> #include<conio.h> using namespace std; class student { public: int id; double gpa ; ...

[2 replies] Last: and default initialise id and gpa class student { public: int id {... (by seeplus)

by mechatronicb

Iterating data on C++ Visual Studio

I have some data from arduino and want to show it at C++ CLR Windows form visual studio 2019. Everything is good but this is the problem. Oh ya btw I'm newbie...

[6 replies] Last: What does "shows the iterate' mean? the data is in binary form Does ... (by coder777)

by learner999

Passing the data from file to the function

Hello everyone , I need a small help for my c++ function. I am writing a function called "calculate". The Pr array is a data in a file called "fileX" and i...

[3 replies] Last: Hello learner999, In addition to what Mif said it is best to provid... (by Handy Andy)

by chipresistor122

Potentiometers vs Rheostats

Write your question here. Hey Everyone, This is a little off topic. I found an earlier post http://www.cplusplus.com/forum/beginner/247175/ on this fo...

[4 replies] Last: There is a lot of blanket reporting going on, deleting a number of new... (by George P)

by DonnaPin

rvalue / lvalue

I am learning about r and lvalues and I think i am following the basic concept, but on the site I am learning from there is a piece of code that I am a bit conf...

[1 reply] : The key, from what I understand, is that you can't take the address ... (by Ganado)

by emcp

Attempting to use Templates and a class I define not compiling/loading

I am learning a bit of thread programming via this book C ++ Concurrency in Action. In the current place I am stuck, I am trying to test out thread safe object...

[9 replies] Last: -- Conan: Adjusting output directories -- Conan: Using cmake targets... (by emcp)

by akira5555

tuition calculator

this is the excercise Suppose that the tuition for a university is $10,000 this year (year 1) and increases 5% every year. Write a program that computes th...

[14 replies] Last: Hello akira5555, Sorry for the delay. After testing your new code an... (by Handy Andy)

by hbcpp

How to get the keyboard layout

How I am trying to get the keyboard layout name (for example US Keybord or Portuguese Keyboard) from within c++? I used this: HKL kb = GetKeyboardLayout(0); ...

[1 reply] : Maybe https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-wi... (by George P)

by hbyte

Particle Swarm Optimization

Here we are finished on a new machine. The last two machines broke down. But I finished before new years. The PSO - Partical Swarm Optimization algorithm has...

[7 replies] Last: I haven't a clue. I only tried Holder's table. Holder's : Global Bes... (by lastchance)

by fsonnichsen

Passing enum variable to a function

I am trying to pass an enum variable to a subroutine. The code is shown below. I thought that the declaration enum I2C1_MESSAGE_STATUS humid_status; woul...

[6 replies] Last: [quote=fsonnichsen]All of this is a bit strange to me as I do not real... (by closed account z05DSL3A)

by tdilley28

Constructors and arrays

I'm currently in school in my second c++ class. (ADVANCED C++) To be quite honest, these courses are terrible. Learn more on youtube. Anyways, I'm struggling w...

[4 replies] Last: I've made some changes (eg initialiser list, pass by ref rather than v... (by seeplus)

by joe809

Random Number using Function

Hello everyone! I'm trying to make a game where the program gives you a random number(char) from an array. The problem is that for some reason it keeps retu...

[3 replies] Last: I managed to get it fixed without having to make a loop. I just added ... (by joe809)

by hbcpp

Encrypt/Decrypt File with Crypto++

I have found this two functions in a post. void EncryptFile(const char *fin, const char *fout, const char *passwd) { FileSource f(fin, true, new Defaul...

[6 replies] Last: @jonnin You will have to learn the LIBRARY (what functions to call in... (by hbcpp)

by skcpp

Simple question on pointers

In below code, foo points to the address where the value of bar is stored. Should I be able to find the address of foo itself using yet another pointer xyz? ...

[6 replies] Last: Okay, thanks all. (by skcpp)

by yem

compiler Error???

Anyone know why I'd be getting an E0304 in visual studio for the line with the comment? It's part of a bigger code but I don't think the rest is relevant... ...

[7 replies] Last: Use emplace rather than insert: codeMap.emplace(temp, encodedChar);... (by seeplus)

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