General C++ Programming (Page 3)

Include debugging feature in makefile
Hi, I would like to add a debugging feature in a makefile (flag -ggdb of g++). A quick and dirty s...
[2 replies] Last: Works nicely! Thanks!! (by pfannmoe)
extract diagonal elements from a matrix
Hi, I would like to extract elements from the main diagonal and a diagonal line that is 1-step afte...
[4 replies] Last: Thank you for your help. (by nurulhudaismail)
class scope
Hi guys, in terms of scope , getPersonOne is valid, getPersonTwo is invalid or can cause undefine...
[6 replies] Last: As @coder777 pointed out, I made a mistake in my code example - I got ... (by Niccolo)
Simultaneously sorting Vector elements alphabetically and ignoring integers in sort.
I am attempting to sort a vector of string elements in alphabetical order, outputting them using an ...
[7 replies] Last: My lips are sealed. I hope the llama survived. (by dutch)
Convert xls file into a xlsx file
Hello, Is it possible to convert a Excel file from *.xls into *.xlsx in C++? But not in C# using...
[8 replies] Last: BTK anyone? Foiled by metadata! pretty much lol. Take a look though ... (by jonnin)
My program shows function declared as void
WritMy program shows function declared as void .The program is about library system . User can enter...
[2 replies] Last: Also, at line 75, an | is the bitwise OR-operator. If you want to ch... (by nuderobmonkey)
Need help encrypting/decrypting a sentence. ascii
Write your question here. c++ ascii issue. I am only able to encrypt/decrypt 1 word and my assignme...
[2 replies] Last: Salem c is right, "cin" is splitting the sentence you input for each s... (by Zaap)
by kitfox
How to create list of classes at compile time?
I'm trying to figure out a maintainable way to have an XML loader be able to lookup loaders for subs...
[5 replies] Last: Thanks for your suggestion, Niccolo! This is exactly what I was looki... (by kitfox)
calculate average of a diagonal line of complex matrix
Hi, I would like to calculate the average of the diagonal elements of a matrix. May I know which par...
[4 replies] Last: Thank you so much . It works. (by nurulhudaismail)
Getting an error while initializing the size of an array
I have a following function "arrayMerger" and I want to add up size of two arrays and then assign it...
[3 replies] Last: The standard library has std::merge() (by JLBorges)
How to add a diagonal elements of a complex matrix ?
Hi, I would like to add the diagonal elements of a complex matrix. Unfortunately, i...
[2 replies] Last: Thank you. I am sorry for this silly mistake. I admit that I checked... (by nurulhudaismail)
Undefined reference with namespace, can you help me ?
I'm creating an app which need the creation of a namespace, but I've a beautiful undefined reference...
[2 replies] Last: Thank you a lot ! I missed this error :( (by LeFanDOst)
by Zaap
Crazy encrypting algo (1,2,3,4)
I made a server/client network program with encrypted communication. I generate a key (ex: 495238...
[61 replies] Last: This is not help, Zaap. It's self-help. One day I can start socket pro... (by Emil Enchev)
Competitive programming
can someone help me solve codechef long problems please? :(
[10 replies] Last: I'd stay away from codechef. To me, those problems are really contrive... (by jonnin)
Passing array to function
Hi guys, How I can pass array of one type(lets say uint8_t) to function as parameter with different ...
[4 replies] Last: > I'm trying to make function that will split array of values into byt... (by JLBorges)
I need a help, I don't know what to write in int main() in this program to get array and sum of fris...
[1 reply] : First, please use code tags. They make posted code easier to read. See... (by keskiverto)
Compilers, bit operations, and data alignment
Lets say I have some struct compiled for a 64 bit processor: struct MyStruct { __uint32 d1; __in...
[7 replies] Last: Thanks everyone for the info. It was helpful. One last question thou... (by primem0ver)
by vroll
Binary Search not returning properly
I'm trying to do a binary search that returns the location in a vector, given the element content. (...
[2 replies] Last: you make recursive calls, but don't use their result also, the index i... (by ne555)
Should = default constructor be noexcept?
If I make a constructor = default : Object::Object() = default; should I mark it as noex...
[2 replies] Last: The defaulted default constructor is implicitly non-throwing unless -... (by mbozzi)
pushback error using vectors
would appreciate som wisdom on why the code has an error on a pushback function. all help or info on...
[2 replies] Last: rioLoc should be a vector of strings. What this function should do is ... (by javyesco)
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  Archived months: [may2019]

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