Beginners

by admin
Welcome -- read before posting!
 
Welcome to the beginner's forum in C++.com! In this forum, users can to talk about any topic relate...
[2 replies] Last: How To Answer Questions in a Helpful Way Be gentle. Problem-relat... (by admin)
Console Closing Down (1,2,3,4,5,6,7)
 
Hi, i am new to C++ and have just written my "Hello World" program. It worked all right but the cons...
[120 replies] Last: It displayed "Hello world" after you pressed Enter. int c is a ... (by Duthomhas)
Git problem
 
Hi. I am trying to get out a confused git situation. I can't really remember how I got there, but I...
[7 replies] Last: Thanks for the replays I kind of solved the issue (by Jonathan100)
by Mif
C programming. Using uninitialized memory warning.
 
I keep getting this warning even I initialize the memory, then I double-check the code paths to ensu...
[17 replies] Last: I found a lot of info and a few C implementations for the A* Search al... (by George PlusPlus)
Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is...
 
Hi, I am getting an error when I run my program. the error is... Unhandled Exception: Syste...
[18 replies] Last: Any ideas? Got lots of ideas, you've already been offered several by... (by George PlusPlus)
by cgm2k7
Reading files with fread() in chunks.
 
Good morning everyone! I would like to ask for a little help here on the forum. It's like this. I ...
[18 replies] Last: Just wait for when you have EVERY post reported, including ones that p... (by George PlusPlus)
by demhat
function declaration with MACROs
 
hi guys as I know function declarations are like this: void ClearBackground(Color color); ...
[7 replies] Last: And, for one question within the OP: Yes, there can be more than just ... (by keskiverto)
MPI runtime weird example
 
Hi guys, I have a weird mpi example where I don't understand the used runtimes. #include <iostrea...
[1 reply] : its hard to know what is really going on with caches, other processes,... (by jonnin)
by zzzhhh
Why do I have to surround parentheses in this fold expression?
 
template<typename... Args> void printVariadic(Args... args) { (... , (std::cout << args << ' '));...
[1 reply] : Because the standard defines a unary left fold expression as: ( ...... (by Peter87)
need some help
 
That seems pretty close to being right, why don't you post the whole program? In case anyone stumbl...
[11 replies] Last: George, I would avoid directly hyperlinking the profile, if you don't ... (by Ganado)
by colt
Simple tga writer not working correctly.
 
Hi. I did write code to write a simple tga file format file. Unfortunately, it does not seem to w...
[3 replies] Last: You might consider finding an already existing 3rd party library and u... (by George PlusPlus)
Namespace std not recognized in public API.h for shared library (1,2)
 
It has been quite a while since I was working intermittently on my project to write a C++ shared lib...
[21 replies] Last: smart pointers are used as an 'owning' pointer. They 'own' the allocat... (by seeplus)
Segmentation fault (core dumped)
 
Hi, I get strange segfault error when working with hierarchy of c programs (3 stages) I can give a ...
[6 replies] Last: Thanks folks, the error was due to a buffer overflow of char array I ... (by Jonathan100)
by zzzhhh
It is known that we can't initialize rvalue reference with lvalue, but why can function name?
 
It is said that we can't initialize an rvalue reference with an lvalue. For example: int i=0; int &...
[5 replies] Last: And the standard you cited is two floors above: "http://eel.is/c++dra... (by mbozzi)
by zzzhhh
Why is const gone in the return type?
 
template <typename T> const T&& Test(T&& t) { return t; } ...... int i = 0; int&& irr = std::mov...
[5 replies] Last: @Peter87: Thank you for referring me to the relevant Standard. I think... (by zzzhhh)
Convert binary to base 58
 
I want to convert a long binary number, 256 bits, into a base 58 char array using c code. I cannot ...
[10 replies] Last: I get the same result on those 2 sites (dcode only accepts decimal inp... (by DizzyDon)
by Ch1156
Best way to modify a variable in a class (1,2,3,4)
 
So whats the best way to modify a variable in a class? Below I have a version that does so through a...
[63 replies] Last: I suggest you look into OOP class design using UML etc. This will give... (by seeplus)
Finding minimum element of a tuple on the basis of first element
 
Hello everyone, I do not know, if it is possible to find the minimum first element in a tuple wi...
[5 replies] Last: I have a tuple like this : data=[ ( 23, a, 3.78, d), ( 11, x, 5.8, w)... (by seeplus)
by zzzhhh
Which ctor of std::unique_ptr is used, when there is a user-defined deleter which is a function?
 
Following is excerpted from section 12.1.5 of text "C++ Primer", which contains text and code constr...
[1 reply] : The code calls constructor 3 or 4. When the cppreference page writes ... (by Peter87)
txt file to vector giving wrong values
 
I'm loading a txt file into a vector using the code I've written below. It works great except for o...
[11 replies] Last: There's a good (and free) set of C++ tutorials and lessons available o... (by George PlusPlus)
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