General C++ Programming - C++ Forum - October 2022 (Page 2)

How to print Eigen tensor EVERY iteration?

I made an older post about printing an Eigen tensor into a text file and where the example I am using here isn't really ideal, it ended up working for me throug...

[5 replies] Last: @mbozzi Thanks A LOT! This is perfect. (by JamieAl)

by kailarob

File stream read in error

Hello! Context: I am making a simple code to read in a maze from a file the maze should look like this: 5 5 .S.#. ##.#. ..... .#### ....F but instead, it lo...

[2 replies] Last: Thank you and also I added the code tags ty for the article (by kailarob)

by Worldtreeboy

how to prevent duplicate when compare 2 string vector.

#include <iostream> #include <vector> #include <random> #include <algorithm> #include <iterator> #include <ctime> #include <set> using namespace s...

[5 replies] Last: It has been a while since I have used c++. The forum format has change... (by oggin)

by Cplusc

elseif condition in macro

anyone knows why I am not getting the _dim and _nnodeLtc correctly from the following piece of code? #pragma once #ifndef _INCLUDES_H_ #define _INCLUDES_H_ #...

[13 replies] Last: thanks for your answers. (by Cplusc)

by JamieAl

how to print Eigen tensor to text file?

I am trying to print a 3D matrix into a text file and use it to make plots in MATLAB. I have been using std::ofstream("3DTest.txt") << Test; for all my Eigen ...

[6 replies] Last: The issue is this is readable as 16x256 instead of 16x16x16. Same ... (by lastchance)

by leo2008

sort option needed

which sort (bubble,quick, merge) option best suited here? 1)A list sorted except for one item, which is in wrong place? recursive merge sort??

[12 replies] Last: Better to use the C++ library for most uses of sorting instead of rel... (by keskiverto)

by JamieAl

Error when taking max value of Eigen tensor

I am trying to get the max value of an Eigen tensor, something equivalent to max(max(max(T))) in MATLAB. The thing is I got a case that works for me: stat...

[4 replies] Last: @lastchance Thanks! I am confusing myself A LOT because I am using MA... (by JamieAl)

by marhuum

How to do dynamic scoping

How come not able doing a dynamic scoped variable, how to do dynamic scoping in c++ as this illustration fails: void f(int i); void fn(int& m){ int i; ...

[6 replies] Last: Respectfully @abdulbadii I don't understand why you don't want to use ... (by Geckoo)

by Hawlong

inline assembly

hello all , i make hook to read some address from ebx to this value all work good But every time the same address is printed, I'm sure there are many address...

[no replies]

by JamieAl

Output inside function mismatches outside function

Why does my function returns zeros when called in a script but then if I try to print out the output "inside" the function I get the correct results? I am confu...

[2 replies] Last: @JLBorges oh I see. Thanks! (by JamieAl)

by marhuum

One explain on initializing each vector argument.. please

one outright understand definitely each vector argument in initialization (v) ? enum Mon : int { A = 5, B, C }; struct M { explicit M(Mon m, M...

[2 replies] Last: When posting code, please use code tags so that the code is readable ... (by seeplus)

by t im

Virtual function and class inhertance

I'm confused about the code below: class A { public: A() { bar(); }; virtual ~A() { bar(); }; virtual void foo() { cout << "1"; return; } virtual vo...

[4 replies] Last: Truly grateful for all your help. I get it. (by t im)

by t im

About std::move string and int

string s1 = "str"; string s2 = move(s1); // s1 is empty int num1 = 1; int num2 = move(num1); // num1 is still1 Just as the code above, why does the st...

[5 replies] Last: Thanks for all your relpy. I get it. (by t im)

by t im

Const with function

What is the difference between 'const' before and after function name in the code below: const int foo() // const before { return 1; } int main() ...

[5 replies] Last: I guess I must have misread the question because I ended up answering... (by Peter87)

by JamieAl

How to copy data to an Eigen tensor?

I am trying to copy the output of an array after taking the 3D FFT to a complex Eigen tensor and I am not sure how to do it correctly. Example: static const ...

[3 replies] Last: @mbozzi wow! I mean, I almost gave up on this particular issue. Thanks... (by JamieAl)

by marhuum

What's this using usage on a class name

what is using for a class name scoping the name too ? as read one's code class T { public: virtual int m(); //.. } struct M : public T { using T::T; ...

[1 reply] : You are inheriting the constructors from T. https://en.cppreference.c... (by Peter87)

by marhuum

Help ensure/confirm type of..

The type of array index is std::size_t isn't?

[3 replies] Last: Note that if you have an index of type int and are comparing it's valu... (by seeplus)

by denver2020

issue with code

Can anyone tell me the issue with below code? will it be segmentation fault? #include <stdio.h> int main() { ...

[2 replies] Last: The type of str is const char* (pointer to const char) and not char*. ... (by seeplus)

by JamieAl

How to take 2D FFT of 3D matrix?

I am using eigen tensor to define my 3D matrix and would like to perform a 2d fft on it. Originally, I was trying to follow with my other code where I take 1d ...

[12 replies] Last: So, this works for 3D FFT for a sine test function and I will be doubl... (by JamieAl)

by LukeProducts

WPA2 Handshake extract hash value?

Hello there, i recently wrote some lines of C++ code to read in wordlists, to chunk them up into smaller ones and to crack a hash value by calculating and co...

[no replies]

C++

Forum

General C++ Programming - October 2022 (Page 2)