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General C++ Programming - July 2020 (Page 2)

array

#include<iostream> int main(){ int row,question; scanf("%i%i",&row,&question); int a ; for(int i=0;i<row;i++){ int x; scanf("%i",&x); for(...

[3 replies] Last: The stack's memory space is in the magnitude of a few MB. You're tryin... (by Ganado)

by gc2000

Double LinkedList

This is my program but it does not compile can you guys help me, if you need more code let me know I can add it in another comment. iterator.h #ifndef ITER...

[3 replies] Last: After rearranging the code to get everything in the right order in one... (by dhayden)

by adam2016

Creating a very simple bootloader

Hi Guys, I'm following along with - https://www.cs.bham.ac.uk/~exr/lectures/opsys/10_11/lectures/os-dev.pdf this tutorial/pdf outlines how to make a very simp...

[12 replies] Last: Thanks Helios :) I actually tried adding the optional "0XFF" didn't s... (by adam2016)

by afedorov

When is move assignment/constructor is called

I am trying to understand when is the move constructor assignment is called: #include <string> #include <iostream> struct A { int *number = new int{123...

[4 replies] Last: is it copied, or it is optimized right to the function code The only ... (by helios)

by QatarAirways

Random number doesnt work as "usual"

Hi, i wanna set the range of a random number for myself: int x; do { srand(time(NULL)); cout << " X Wert " << endl; cin >> x; int y = ...

[4 replies] Last: <random> might be better suited to what you are wanting to achieve: ... (by deleted account xyzzy)

by zStupan

How to linearize N-dimensional array index?

I'm trying to implement a simple n-dimensional array / tensor. Right now my class definition looks like this: #include <cstddef> #include <array> t...

[1 reply] : x -> data x,y -> data[x*columns+y] x,y,z -> data[x*columns*height + y... (by ne555)

by oneidacharisse

Encrypted word dictionary with RSA encryption

Hello, I'm all over the place. But I wanted to make an encrypted word dictionary with the RSA system. But I have a problem before generating the word encryption...

[9 replies] Last: I don't know what you are trying to do with the double, but be aware: ... (by jonnin)

by closed account Ey80oG1T

Destructor not working

So I'm making a SLL class, however, it appears that I have some memory leaks. Here's the code that's causing problems: // used to detect memory leaks in V...

[2 replies] Last: Yeah, just put braces around lines 56 to 59. And if you want to be ab... (by dutch)

by closed account Ey80oG1T

How to assign unique ptr?

I was using raw pointers, but I decided to switch over to smart ptrs instead. I've never used them before, so I'm really clueless. So I have a unique ptr lik...

[2 replies] Last: How to use std::unique_ptr s: https://www.learncpp.com/cpp-tutorial/1... (by deleted account xyzzy)

by akash16

insert multiple rows in table

Hi All, In my code, I have a std::list of objects those I need to insert into a oracle table. What I can think now is writing an insert statement in a loo...

[1 reply] : This sounds more like a SQL question, not a C++ question? Correct me i... (by Ganado)

by noahpereira20

valgrind how to check a pointer without errors

Hello fellow earthlings, I need to check a char array to see if it is valid or not, it could be a nullptr, but not a unsigned pointer, and the safe state is ha...

[6 replies] Last: This is an assignment operator, not a copy constructor. It will be ve... (by doug4)

by ebya

please help me

A) Write a program to automate the billing system for a restaurant. The program should do the following: Show the customer the different items offered by the...

[14 replies] Last: Here's another way of going about it as a start. Maybe you can store t... (by againtry)

by noahpereira20

Execption thrown when deleting a valid pointer

Hi Fellow Programmers! I am having some trouble with this small project. I am getting a exception thrown at me from "delete_scalar.cpp:Line 34: _free_dbg(bloc...

[6 replies] Last: Add the definitions tempMenu(tempMenu const& other) : m_title(new c... (by mbozzi)

by noahpereira20

cout formatting not working sometimes

Hello fellow stressed out programmers. I'm trying to format my text but it is not working as defined here is example. expected output ***Menu*** 1...

[2 replies] Last: blessings to all Gee, thanks, magic man. (by dutch)

by afedorov

How to test if destructor cleaned memory

hello, I am writing simple handle that stores reference to object in free store. I want to write test to check if after destructor invocation this object is a...

[18 replies] Last: ja, I've got no output running it through valgrind (by ne555)

by GonlyG

Problem with solving Ax+B mod M = 0

I'm given A, B, M and have to solve for x in several equations. My output is constantly incorrect and I can't figure out why. Any help would be appreciated. ...

[7 replies] Last: I checked that gcd(a,m) == 1 ensuring they are coprime... (by GonlyG)

by fewdiefie

Drawing my axes (1,2)

hello guys, I'm trying to draw my X, Y and Z axes at the top right handside of my screen just like this: https://imgur.com/v6sK2zq, I can draw those axes in th...

[25 replies] Last: @gonado thanks, finally an answer, have you looked at the image I uplo... (by fewdiefie)

by sav44

days of week program (1,2)

Hi everyone. I am in a computer science class and was given the task of writing a code USING ONE DATA MEMBER in order to implement the days of the week (set the...

[29 replies] Last: He's someone who doesn't have the knowledge or skills to backup his f... (by dhayden)

by nuderobmonkey

Decorator Pattern

I've implemented a decorator pattern example, but I'm unsure if I have it done correctly. I'm unsure if the destructors are implemented in the right manner. Esp...

[5 replies] Last: dhayden wrote: I don't think AddOnDecorator should derive from Bever... (by nuderobmonkey)

by xy06

Please help me with these C++ program questions

Write C++ program to create directed-weighted-graph data structure using adjacency list (use link-list). Insert 1000 vertexes, use random function to insert edg...

[4 replies] Last: Thank you so much!!!!! Appreciate it. (by xy06)

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