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General C++ Programming - October 2018 (Page 6)

Receive "at char" as "@" instead of "%40"

When I submit a html form that contains this char ( @ ), the server receives "%40" instead. Can I "pre-set" something to get the correct char right away, or ...

[1 reply] : That's the way it is supposed to work. You need to url-decode the stri... (by Duthomhas)

by cmisip

Building a fast "blobbing" algorithm

I am trying to put together an algorithm for sorting data into containers. Basically, a video frame is subdivided into blocks. Each block will have a value of...

[15 replies] Last: explain your implementation My naive implementation is the code in... (by cmisip)

by darrionkg

How do I make this for loop work

So I've been messing with this code for a while trying to insert an integer into a list with a function call. Here is the function call in the main file. This c...

[1 reply] : Maybe something like this. #include <iostream> using namespace std;... (by tpb)

by sonia123

vector

Each student now has 3 raw scores from 3 exams, and their corresponding weights for grade are 30%, 30% and 40%. Your program need to convert these raw scores i...

[1 reply] : I need to change the array into a vector Student s ; becomes std... (by Repeater)

by Salsa Boy

How to build a program with SDL2

I have a program which works fine on my computer which uses SDL2. If I send it to someone who has installed the SDL2 developer libraries, it runs fine. But if I...

[8 replies] Last: Well you are gonna need to figure it out yourself then. (by poteto)

by Trev

window not declared in this scope

Hi i'm useing windows 10 ,codeblocks 1712, sfml 5.2 and after 2 and a half weeks i finally have it working sort of below is the code i'm useing ( its not mine i...

[4 replies] Last: I was really surprised when you said "SFML 5.2", but then realized you... (by Ganado)

by even better

program to ask for email and password

hi guys i am kinda new to programming i was thinking is there any way to make a program that asks for email and password and sends to the developer. thanks ...

[1 reply] : Sending emails requires an external library. Google for "sending email... (by Thomas1965)

by wolfie16

KMP algorith with a vector

In the following program I have a three class hierarchy. Item is the base class and Product and Service inhererit from it. I want to implement the KMP algorithm...

[1 reply] : Start by writing the KMP algorithm. Test it. Then call it with your ... (by dhayden)

by volang

Read from text file. Set position x y

I can not find anything about it, but I want to ask anyway. Is it possible to read a character from a text file by setting x and y coordinates? Here is a...

[4 replies] Last: If you are allowed to use std::vector you can read all the lines into ... (by Thomas1965)

by volang

Creating GET/POST arrays

Hello guys. PHP is built with C. How do they manage to create/deliver "GET" and "POST" variable-array? E.g. I send a get request and the server receives "fna...

[9 replies] Last: Allright. Thank you all. I appreciate it (by volang)

by ssol

split words in file by using getline

hello, I want to get words which are split by tab('\t') for example, Hi my name is ssol is my inputfile. and I want to split ...

[2 replies] Last: "It doesn't work" means nothing. The code you posted does exactly what... (by Duthomhas)

by Nick1245

C++ input and strings

Hello everyone I am working on a project for my CS class and I am stuck on part of it. I am new to C++ so it's been hard at times. I have a line of data in ...

[4 replies] Last: The purpose of assignments like this are to verify/enforce understandi... (by Duthomhas)

by lumbeezl

Std::bad_alloc on Windows 10 but not on Ubuntu

Machine: 32 GB RAM Intel i7-6700 @ 3.4 GHz I am streaming a text file into a vector with 52 doubles/element and 16 int/element. With same code and text file,...

[15 replies] Last: You should only consider a different data structure if you need to fr... (by lumbeezl)

by JUAN DENT

What is wrong with this metaprogram?

Hi, I have taken a metaprogram from a book and tried to make it work without success. I was wondering if someone can help me, clarify the attempt. The code'...

[7 replies] Last: Got it!! Thanks mbozzi! (by JUAN DENT)

by ImAllThumbs

Need some help debugging a program in C++

Hey all, I have been working on this practice program for my coms class and was having some trouble figuring it out and was wondering if anyone could take a loo...

[6 replies] Last: Checking all the failbits gives the same side effect of checking eof (... (by poteto)

by altbrian

Ignoring a value with a while statement

I am working on an assignment that revolves around calculating the average boxes a seller sells. My main question is is that starting in line 22, if the valu...

[2 replies] Last: While that would be correct, my assignment does ask for "appropriate w... (by altbrian)

by swahajali

Can anyone teach me how to code this program

Generate 20 random numbers using rand() built-in function and store them in 4x5 array. Ensure that the 4x5 array is created dynamically using smart pointers. N...

[2 replies] Last: sir,problem was that how to to pass 2D array which is created my smart... (by swahajali)

by closed account DEhqDjzh

How to link 2 exe projects in visual studio

Hi, I am making a Game Engine which consists of 2 projects: 1. The editor project 2. The game loop project In the editor project, there is a function called ...

[no replies]

by IceHawk19

Unknown errors in a class with multiple constructors and deep copying

Vector.h https://hastebin.com/zotejiqazu.cpp Vector.cpp https://hastebin.com/suxujumaxu.cpp main.cpp https://hastebin.com/jexezarage.cpp I do not un...

[1 reply] : please delete the duplicated post http://www.cplusplus.com/forum/gener... (by ne555)

by Hephaestus1233

Passing by reference issue

So I am attempting to make a sorting program using the QuickSort method. However I am passing a vector by reference I think it is that that is messing my result...

[3 replies] Last: I personally wouldn't use a stack. I would just code it recursively. U... (by tpb)

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