please wait
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by JamieAl
Eliminating use of for loop with Eigen
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| I am trying to build a row vector and column vector using Eigen library to multiply them together to get a matrix without a use of for loop. Original code: ... |
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Jun 16, 2022 at 2:43am
[1 reply] : See: https://eigen.tuxfamily.org/dox-devel/group__TutorialSTL.html (by JLBorges)
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by JamieAl
Extract rows/columns of matrices in C++ vs MATLAV
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| In MATLAB you can extract the first and last rows of a matrix by A(1,:); A(N,:); Is there a similar way in C++ where we can do this? For example, ... |
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Jun 16, 2022 at 1:09am
[18 replies] Last: Thanks everyone for the incredible feedback/info! I am working with Ei... (by JamieAl)
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by mickydint
iterator problem
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| I am copying an example from a book and it wont compile. I am trying to copy a vector<string> to a set<String> using transform, as it will make all the strings... |
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Jun 15, 2022 at 8:46pm
[4 replies] Last: Just been looking at it and I noticed the return type. Thanx for look... (by mickydint)
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by sarvcr
Linked List with templates
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| Question Solved. Look at SeePlus comment if you have a problem like this. Hi! Long story short, I've been struggling way more than I'd like to admit to unde... |
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Jun 15, 2022 at 7:18pm
[9 replies] Last: It's working perfectly now. I really appreciate all the help you've gi... (by sarvcr)
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by Al Green
char*/string function type
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| Hi folks! I'm trying to write DLL with a function that accepts a string, manipulates it and returns shorter version of it. Previously I was able to create si... |
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Jun 15, 2022 at 6:49pm
[4 replies] Last: @thmm Thank you, I used your code and it works now! You are awesome! ... (by Al Green)
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by ElusiveTau
What's the difference between overloading operator<(Class& a) and operator<(Class& a, Class& b)?
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| What is the difference between overloading operator<(Class& a) and operator<(Class& a, Class& b) ? Which needs to be defined for a user class for the std... |
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Jun 15, 2022 at 6:54am
[8 replies] Last: How many calls are used when it's sorted Apparently still just 1. M... (by Peter87)
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by satsat111
A calculator question
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| Hello I'm trying to implement a simple calculator supporting variables. And my question is the LValue can be int or var, and if it's unused the initial value s... |
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Jun 14, 2022 at 2:07pm
[10 replies] Last: istringstream gives a stream from a string. This can be used as a stre... (by seeplus)
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by MHS1986
Undefined reference?
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| Hi, i am new to C++ and while practicing i am getting an undefined reference error from the compiler and i dont know why... Can anyone see what the problem is b... |
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Jun 14, 2022 at 6:51am
[4 replies] Last: Part of the problem is that you have global: const int NUMBER_OF_ROWS... (by keskiverto)
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by Pen72
Graph problem
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| I'd like to know what condition have I not considered in the code, this should be a DAG problem right? My code appears to be wrong in the first sample test case... |
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Jun 14, 2022 at 4:42am
[6 replies] Last: Hello, yes I think it should be m, must be typo mistake. Thank you for... (by Pen72)
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by SITHESH
Adding a blocker in a board to restrict cell access.
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| I have game of Abalone that I have created I am looking for ideas to insert a blocker on the board. This blocker should be randomly inserted on the space that ... |
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Jun 13, 2022 at 6:06pm
[5 replies] Last: Thank you, @jonnin, for the feedback on this and to @George P for the ... (by SITHESH)
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by Pen72
Find words
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| I don't know where my code went wrong, I got two correct answers and 8 wrong answers, thanks in advance for any help. A word is defined as a string of w chara... |
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Jun 13, 2022 at 1:15pm
[4 replies] Last: #include <iostream> #include <string> #include <map> #include <set> ... (by seeplus)
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by Pen72
inorder traversal
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| Hi I'm trying to implement inorder traversal in BST. The issue I got here is, if the data is already in BST, the operation must be ignored. I used a vector to ... |
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Jun 13, 2022 at 1:15pm
[3 replies] Last: Your question asks about Inorder traversal but your post alludes to tr... (by ElusiveTau)
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by rozick1
map with iterator as key?
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| Hi I'd like to have a map where the key type is an iterator. This will not work out of the box because a map requires the availability of the less than operato... |
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Jun 13, 2022 at 4:59am
[4 replies] Last: > Does anyone know a way of defining a less than operator to an iterat... (by JLBorges)
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by Geckoo
Format integer as a string
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| Hello. Is there a way to format an integer according its memory size using to_string ? I explain my will by an example : std::string message = "my message"... |
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Jun 12, 2022 at 9:58pm
[7 replies] Last: Now the message is simply concatenated this way : snprintf(message, ... (by Geckoo)
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by sandbox007
No idea whats wrong
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| Hi, I have two weird questions, not sure if its something wrong with my code... 1) Why is my output 0 ? shouldnt it be 11 divided by 100 multipied by 50 = 5.... |
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Jun 12, 2022 at 9:35pm
[7 replies] Last: However, for a computing system, if you divide an integer by an inte... (by Geckoo)
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by yonagy82
Failure of parameters transfer
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| Hello, I'm trying to build an ESP32-TMC2209 application. The setup of the TMC2209 includes invocation of a hardware serial port to send serial commands from th... |
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Jun 12, 2022 at 1:43pm
[6 replies] Last: Unfortunately it didn't help. (by yonagy82)
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by Geckoo
Color spectrum
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| Hello everyone. I hope that all is fine for you. I am still playing with pixels. Now I am searching for a way to display a cool color spectrum using a simple lo... |
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Jun 12, 2022 at 8:59am
[3 replies] Last: Done. Thank you ++ https://ibb.co/VDt23qs (by Geckoo)
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by Ch1156
What is this code doing?
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| So i'm following this book called SFML Game Development By Example and I've run into some code I'm not too sure what its doing. This entire function I have s... |
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Jun 12, 2022 at 8:32am
[1 reply] : Hello. This code is a good exercise to understand "complex" logical co... (by Geckoo)
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by PhysicsIsFun
decrement size_t in loop (1,2)
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| Hi everyone, I was recommended to turn on compiler warnings for debugging purposes. The compiler frequently complained that I was comparing signed and unsigned... |
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Jun 11, 2022 at 4:10pm
[25 replies] Last: > That approach works fine with VS release... >> Compile without it a... (by JLBorges)
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by hakanxdurak
Process exited with value 3221225477
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| Hello friends, I am currently working on a homework. But the code i wrote is not works as expected what i mean is that when i run the code sometimes i get the ... |
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Jun 10, 2022 at 4:48pm
[6 replies] Last: Thank you all. That helps a lot. (by hakanxdurak)
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