General C++ Programming - C++ Forum (Page 2)

by Zarro110

2d matrix of pixels to screen

I have a program (slime mold simulation) that generates a big 2d array of values. I want to draw thi...

[3 replies] Last: maybe take a look at the example here: http://www.rastertek.com/dx11t... (by jonnin)

by Hybrid10

Struggling to use getline correctly? Skipping inputs?

Hey guys! Im new to C++ and having a little difficulty with this program, Its supposed to be where i...

[9 replies] Last: Perhaps even simplified as: #include <iostream> #include <limits> #... (by seeplus)

by glasert542

What is wrong with my code?

I am new to C++ and I have been working on this for a while to display volume for two classes of obj...

[3 replies] Last: #include <iostream> using namespace std; class Prism { double heig... (by seeplus)

by bassel27

.exe file crashes outside VS but work inside

I have a program that works well inside visual studio when I launch it via local windows debugger, b...

[9 replies] Last: Bassel, it's because the program is over once main returns. And once t... (by Ganado)

by Felipe08

change password program

Have to create a database that contains names, usernames and previous passwords, and hardcode that i...

[14 replies] Last: I use MS VS2019. You need to compile as C++20 for L80. As a minimum yo... (by seeplus)

by lynn22

How do i write the code for balanced array...URGENT please

An array with an odd number of elements is said to be balanced if all elements (except the middle on...

[13 replies] Last: To be honest, I have no idea. He says it works, though. I have sugge... (by agent max)

by steball

Using CImg to creat 3D object and export to .stl file

I have a 15 year old boy that got a job last summer so that he could buy himself a 3d-printer. He ...

[1 reply] : Funny, there was just another thread talking about stl files as well. ... (by Ganado)

by wk10dn29

having trouble with my hw for stl file

* separate compilation Cube.hh Cube.cc Cylinder.hh Cylinder.cc optional: Sphere.hh Sphere.c...

[6 replies] Last: Forgot to give a reply earlier. I'm kind of just winging this, but you... (by Ganado)

by coldscooter

Including/using <regex> will not run on some machines?

I am creating a dll which gets loaded by a game engine. It runs fine on my dev machine, however doe...

[2 replies] Last: Unfortunately I don't get to see any error message, as I only have the... (by coldscooter)

by sergelac

thread_local std::vector error

C++ Builder XE4 this code give the error E2461 'TempOptions' requires run-time initialization/final...

[3 replies] Last: C++ Builder even if it is the latest version (XE4 is from 2013) isn't ... (by Furry Guy)

by pieterdehoogd

Greedy algorithm to fill 2d array

Hello, can someone help me with the following problem: Is there a way to write a greedy algorithm t...

[10 replies] Last: Well here were are, 11 messages into the thread and the OP still won't... (by dhayden)

by onetwo12

split string S

How can I split string S into substring S ? Also substring S should set some number a . Should I u...

[13 replies] Last: cut one segment into two and pay for this a price equal to its length ... (by jonnin)

by juicypwner

Converting struct to class? xxx is private within this context

Not sure how to alleviate this issue (see title). I went ahead and was in the process (not finished ...

[3 replies] Last: If the 0-arg Product constructor must be private, then don't call it. ... (by Ganado)

by bassel27

How to access instance variable value?

I created n objects from the Stock class and assigned a value for the integer instance variable expe...

[6 replies] Last: vector<Stock> shares( n ); ... ... sort( shares.begin(), shares.end()... (by lastchance)

by CVRIV

Having trouble comparing \r and \n from a text file.

I'm having the weirdest issue. I'm trying to count characters in a text file, while excluding \r...

[2 replies] Last: Yea.... I figured this out hours ago. I should of deleted this thread ... (by CVRIV)

by phazed99

Nested class/Double-linked list confusion

Hi everyone, we were provided all the following code and told to write the addLongInt() function. We...

[7 replies] Last: There is still a lot I have to learn. Compare your approach to my c... (by seeplus)

by Kallinteris Andreas

Do custom allocator apply just to containers, and how do i apply them to any memory allocation

https://en.cppreference.com/w/cpp/named_req/Allocator I am referring to this ^^^^ kinds of custom...

[6 replies] Last: There's no point in aligning the vector. (by mbozzi)

by ainsley1006

Log File Wrap Over Failing

Hi All, I'm having an issue with my app at midnight when it's meant to start writing to a new log f...

[6 replies] Last: GCC, for instance, will only warn on shadowing if you explicitly enab... (by MikeyBoy)

by mjjm1442

destructor called after calling constructor

By looking at the example: #include <iostream> int wow=0; class Foo{ int cow = 0; public: Foo...

[7 replies] Last: Okay I already get it. Thanks for your help. (by mjjm1442)

by brharding1

Array of Structures Memory Issue

In my main function, I create an array of structures which stores cache information i.e. dirty bit (...

[2 replies] Last: It would help to see the code that's calling the function. How certai... (by MikeyBoy)

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