General C++ Programming - C++ Forum

Problem with the function pdlacpy/MKL.

Hello! I have a matrix A =| 0 1 2 | |3 4 5 | | 6 7 8| and I want to copy the first two columns to another matrix B like this B =| * 0 1| ...

[1 reply] : Read the source, it describes the parameters: http://www.netlib.org/sc... (by Smac89)

by voilback

Remove duplicates vector of strings, keep first instance. Can't use algorithm

I have a vector of strings.vector input; bob sam bob sammom aardvark money aardvark wanted I need to remove the duplicates but each part of the ve...

[4 replies] Last: There are many other ways to remove duplicates and most of them are no... (by Smac89)

by Stephanie16

Constructors

Hi I am not familiar with using constructors. Could someone please explain the reason constructors are used and an example.

[2 replies] Last: Thanks a lot (by Stephanie16)

by Tressor54321

Having Problems with classes

Hello. I am creating a battleship program and it appears for everything to be working fine, except the shots. For some reason my shots and my locations are not ...

[4 replies] Last: Update: I figured out the deploy but the fire function is messed up. (by Tressor54321)

by AeonFlux1212

for imaging experts

Hi! I want to write a program to resize images, and I'm wondering if any of you guys know where I could find reliable information about image file formats (jpeg...

[no replies]

by ryllprous

Is this the same? (vectors notation)

Is the same to write: (1) mesh electrodeMesh(10e-9,4,10); than to write: (2) mesh electrodemesh = {10e-9,4,10): I understand that BOTH (1) and...

[4 replies] Last: Thank you @L B..! (by ryllprous)

by gameprogrammer

Why does this code work that way?

I want to find a code that would search for a natural number n>1 such that satisfies n | 2^{n-1} + 3 or i.e. 2^{n-1}+3 is divisible by n. So I've written t...

[11 replies] Last: yes, the required integer overloads may be packaged as function templa... (by Cubbi)

by Ahmad1797

Constant in C++!

Hello thank for coming to me! //VALID: const int CONSTANT=100; int integerArray ={ 0 }; //but after getting input let's say: cin>>randomInteger; int inte...

[3 replies] Last: Line 8 is perfectly valid, however it is a runtime constant instead of... (by LB)

by PhtCreator

Program, array problem

Hi, I am a beginer in C++. I'm doing a program which made me frustrating. The object is to create a program which should calculate the best way to buy items (...

[no replies]

by Darbear02

I have no idea how to begin to program this...

Create a program that simulates a random walk. It starts with position 0. If a generated random number is an odd number, it moves to the right (add 1), if the...

[3 replies] Last: It's a start. Edit your post and write [co de] before your code and ... (by LB)

by ryllprous

Types of arrays

Can somebody explain me the difference between: 1. int normalarray = {1,2,3,4,5}; 2. std::vector<int> vec(5); 3. int* dynamic = new int ; ?

[6 replies] Last: Ok, thanks for your help..! :) (by ryllprous)

by DARDAR1991

recursive merging linked list - HELP!!

hey i've just started learning building structures in c++ and they gave us an exercise of writing a recursive merge code of linked lists - just merging without...

[1 reply] : Please use code tags when posting code, to make it readable: http://w... (by MikeyBoy)

by praneshiitm

compilation error

can someone just compile this and tell me what exactly the error do this code have? #include "stdafx.h" #include<iostream> using namespace std; double ...

[17 replies] Last: hey daleth, i tried hard to find out why my values of y are showing li... (by praneshiitm)

by lazyman

creating a copy of BST

void copy(node *& dest, node * root) { if(!root) { dest = NULL; return; } else { dest = new node; dest ->...

[2 replies] Last: The seg fault might not be coming from this code. I don't see anywhere... (by Smac89)

by NDSE

reading from a .txt file

Hello. I am having an issue loading information off of a .txt file. The file reads the following: Minor Health Potion 0 0 0 0 0 0 0 0 0 1 10 0 1 5 Although...

[6 replies] Last: Correct, that is where I have it. I moved the txt file to the working ... (by NDSE)

by JasperBraun

Code Reference

I just found the website: https://code-reference.com/start It is supposed to be a reference for programmers, but it is just starting out and very small. If anyo...

[3 replies] Last: If you're not sure where to start typing your code and getting result... (by Catfish666)

by poohpooh

std::string in std::map clear error

hey im using this an i cant find what im doing wrong my program crashes when EraseLastError function is called struct STATSSTRUCT { std::string LastError; ...

[10 replies] Last: when is the best time to use pointers in this kind of thing im doing?... (by MikeyBoy)

by stabilize

Compiler/Linker differences in Visual Studio conversion

Hi, First post. I apologise if I break any rules/post in wrong section. I have a project that is essentially a hot pot of C/asm (naked functions etc). The co...

[1 reply] : What errors/exceptions does it give away? Or it simply doesn't work? D... (by tath)

by fluture

University information

Hello everyone ! I want some help related to university courses.. Does anyone know what profile/course should i follow at faculty time if i want to study algor...

[4 replies] Last: thank you anyway for the help provided (by fluture)

by lolwe

Help for some functions

Create Class CSalary with private member variables string m_strProfession double m_dSalary Constructors:Default,Copy,Explicit Functions: 1/string GetPro...

[1 reply] : Your equality comparison operator is only checking the m_strProfessio... (by MikeyBoy)

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General C++ Programming - March 2014 (Page 18)