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General C++ Programming - June 2020 (Page 4)

by zeelia
How to prevent the system using the same account and IC number
 
Hi My only problem here is to not make a duplicate account number with different detail. How can i do that ? #include<iostream> #include<fstream> #inclu...
[1 reply] : Hi My only problem here is to not make a duplicate account number wit... (by kbw)
by Eristato
Trying to convert data to an image
 
Good Afternoon. I've been trying to convert a hex string to a image for a while now. I found most of the conversion code on github, an I called it and was able ...
[1 reply] : first try saving it as a raw file (just an array of RGB pixels, one by... (by jonnin)
by closed account jGAShbRD
move assignment
 
template <typename Type> my_unique_ptr<Type>& my_unique_ptr<Type>::operator=(my_unique_ptr &&target){ if (raw_pointer == nullptr) delete raw_pointe...
[9 replies] Last: How to use code tags: http://www.cplusplus.com/articles/jEywvCM9/ No... (by George P)
by DarkMike
Hiring a C++ Programmer
 
I don't know where to post this but I'll post it here since everyone here must be a subject expert in this field. I am looking for a C++ expert to help out wi...
[4 replies] Last: There's no mods here. You can repost in the job section. (by zapshe)
by Aaron Vienneau
Question regarding boost::serialization and placement new
 
Hey guys, The TL;DR is: How does load_construct_data from boost::serialization know how much memory to allocate for a class when loading through a pointer? ...
[2 replies] Last: For posterity, I have the answer: Detailed within the boost documenta... (by Aaron Vienneau)
by lablnet
Delete//Update row in csv file without rewriting it by using C++?
 
I am student of BSSE first year and we have project and am doing that. but our requirement that manipulate data using files, so i am using csv file. but the pr...
[3 replies] Last: databases under the hood use all kinds of different approaches. The ... (by jonnin)
by erdemtuna
Parsing Bytes with Varying Fields
 
I have a byte stream that represents a message in my application. There are 5 fields in the message for demonstration. The first byte in the stream indicates wh...
[6 replies] Last: @kbw I didn't know the variant/visit mechanism. I am going to check i... (by erdemtuna)
by closed account jGAShbRD
move assignment
 
...
[2 replies] Last: Performing a swap might result in memory leaks because a moved-from ob... (by mbozzi)
by marhuum
GCC build tools on Msys2/Mingw64 for the win32 api application building
 
How do we build by use of GCC build tools on Msys2/Mingw64 the win32 api requiring source code that lives in directories of Visual Studio
[1 reply] : MinGW includes its own copies of WinAPI headers. (by helios)
by volang
TCP/IP: Stop attacker without affecting others on same IP
 
If one person that's connected to my server, is running a multirequest script that reconnects and continues no matter what, how can I stop it without affecting...
[11 replies] Last: It's allright (by volang)
by thorunkilici
File operations (1,2)
 
Hi friends, my problem is only about file operations. When i type any file operation code, it doesn't create any text file or doesn't edit that i created manual...
[38 replies] Last: Yep, over-aggressive anti-virus can do some really nasty things. Glad... (by Ganado)
by tubar
How can be concentrated multiple lines of C++ code in only one? (1,2)
 
How can be concentrated multiple lines of C++ code in only one? I want to concentrate my C++ code in smaller space. Example 1: I want to put the follo...
[31 replies] Last: Two thoughts on this. First, whenever I need to examine code, the fir... (by dhayden)
by yin
merging programs??
 
So i have three ncurses programs (each one has a main, a cpp and a few header files and text files) and one oop (with text files and one main). This is the i...
[8 replies] Last: Regardless of how complicated the individual programs are, they will a... (by Ganado)
by AlessandroTZ
Template Casting (1,2)
 
Goodmorning to everyone, I'm facing a problem with templates, i need to compare a template with a type variable as follow in my code: enum class allo...
[34 replies] Last: Well i'll try the polymorphism way. If will not solve my problems i'll... (by AlessandroTZ)
by closed account jGAShbRD
move constructor
 
template <typename Type> my_unique_ptr<Type>::my_unique_ptr(my_unique_ptr<Type> && object) ////Move constructor that takes my_unique_ptr object and construct...
[2 replies] Last: my professor sample code on move constructor was something like this (by closed account jGAShbRD)
by DrakonzJG
Read multiple text files bug
 
Hey, guys. Can u help me with the piece of code? So, I must read a text file that contains the name of CSV files that will be in the same folder called "data". ...
[8 replies] Last: I've just changed the objects trying to use STL Vector and it is still... (by DrakonzJG)
by CsStudent145
Error in code Insertion in the begining of list
 
This is the code for insertion in the beginning of the list. #include<iostream.h> #include<process.h> #include<conio.h> struct node { int info; node *next...
[1 reply] : The compiler is giving 1 error saying that there is an error at line ... (by lastchance)
by closed account jGAShbRD
operatiors
 
Dereference operator * that returns a reference to the item pointed by the object. Operator -> that returns the pointer to the object. It allows to use the my_...
[8 replies] Last: my_unique_ptr is a class template, so my_unique_ptr isn't a class in i... (by Ganado)
by JUANDENT
Can I have a template constructor inside a template class?
 
Hi, This does not compile but it should since other is an instance of a class template which inherits from CheckingPolicy<T2> template < typename ...
[1 reply] : One is a pointer to const and the other is a pointer to non-const. (by helios)
by nuderobmonkey
crossword puzzle generator (1,2)
 
Yes, there at time still a thread open at this topic, opened by @Merari http://www.cplusplus.com/forum/general/270089/#msg1163324 But its approach on how to so...
[22 replies] Last: Here a program version that pre-filters matching candidates. But it ne... (by nuderobmonkey)
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