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Beginners - June 2022 (Page 5)

passing via object vs passing via return

I have two short code examples here. I am instantiating a class and using it to return the sum of two numbers. One pass back the result as a variable in its cla...

Jun 5, 2022 at 12:26am

[12 replies] Last: OK. That makes sense. Thanks fritz (by fsonnichsen)

by tonic

c++ Source for select()

Hello guys, i dont have a good understanding of select() and since im working with sockets lately i need some better understanding of it, can u provide me some ...

Jun 3, 2022 at 3:50pm

[8 replies] Last: If you want to learn network programming, using the sockets library is... (by kbw)

by anonomyss

Variable Diagrams

Draw variable diagrams for the following program with input values 2 (for variable first)and 3 (for variable second). For instance: •A ? shows an uninitializ...

Jun 3, 2022 at 11:11am

[1 reply] : Shouldn't it start with: L19 first ? second ? L21 first = 2 second ? ... (by seeplus)

by bkelly13

addition modulo 32

Windows 10, Visual Studio 2019, C++ I am working on some code that will include SHA-256. In my readings about it, articles mention the use of “addition modu...

Jun 3, 2022 at 5:31am

[7 replies] Last: > Using those makes the intent absolutely clear and does not change fo... (by JLBorges)

by impetus

assign four array items to one int

I have array of four items: a , a , a , a I want to assign these four to one int: no problem to assign two items like array[ row ][ column ] = id; is there...

Jun 2, 2022 at 5:50pm

[6 replies] Last: I did it for combinations, to get all possible combinatios, excluding ... (by impetus)

by impetus

sorted array, exclude duplicates

I need all 4 items be equal as per below, to make condition true it is actually true when any part of below is equal. How can I ammend the code? if (a...

Jun 2, 2022 at 5:48pm

[7 replies] Last: Oh! I finally found slight mistake on function entry, but statement f... (by impetus)

by Daniel Steel

Loops are causing mayhem in the code.

I was working on this logic to sort 2D arrays when I came across a problem. For some reason, the compiler would freeze up when it attempted to do so. I had this...

Jun 2, 2022 at 4:57pm

[4 replies] Last: The output is a bit "strange," courtesy of the (il)logic of the nested... (by deleted account xyzzy)

by rozick1

Interface to access elements without breaking encapsulation

Hi I am designing a library which will store data supplied by the user. I would like for the user to be able to change or delete these objects. But I am cons...

Jun 2, 2022 at 2:30pm

[7 replies] Last: thanks everyone, very helpful (by rozick1)

by dob00000

Finding prime nodes in binary search tree

Idk any ideas about finding primes node =(( #include <iostream> using namespace std; struct node { int info; node* left, * right; }; ty...

Jun 2, 2022 at 12:18pm

[4 replies] Last: finding primes and searching them would be a lot of searches (fast as ... (by jonnin)

by Geckoo

Buffer size using a parameter

Hello everyone. Is there a way to set a buffer size using a function argument? I don't understand why it is not possible. I guess that it is a way to avoid buff...

Jun 2, 2022 at 11:06am

[15 replies] Last: If buffer is going to be initialized after allocation, then from C++20... (by seeplus)

by blackpanther35

Report Card

Write a program that prompts the learner to key in their marks for each subject. The program should include the following functions: a.A function studentDetails...

Jun 2, 2022 at 10:57am

[17 replies] Last: Thanks all , you've all been helpful and I learned a lot (by blackpanther35)

by Cyclone

str_buf.length doesn't reach the end of my loop

Hi, I am using buf.end. My code inserts a return character \r to a string. It works like it should but it stops before the end of the file. Notice the 300 in t...

Jun 2, 2022 at 12:40am

[3 replies] Last: Thanks JLBorges and seeplus. @seeplus. Your suggestion makes sense an... (by Cyclone)

by Jonathan100

use memcpy for pcie burst

Hello there! i have designed a system of pcie root complex using zcu102 xilinx board. i wrote drivers on the processor side as well that initialize, read an...

Jun 1, 2022 at 5:35pm

[1 reply] : this should be done using DMA, not memcpy. Memcpy will work, yes, but... (by jonnin)

by PhysicsIsFun

Estimate relative costs of two routines

Greetings! For a physics inspired numerical method, I want to estimate the relative computational cost of two routines, one used for energy evaluation, one for...

Jun 1, 2022 at 12:29am

[8 replies] Last: good. just note that its crude, as we said. The biggest thing is tha... (by jonnin)

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