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General C++ Programming - March 2016 (Page 6)

Hi, Yes, the question sounds silly, I know... But, nevertheless I need to ask it: because: say we have constexpr double square( double x ) { ret...

[5 replies] Last: Hi, I might attempt to answer this :+) In this link, a constexpr fun... (by TheIdeasMan)

by dogsu1230

help please. vector subscript out of range error.

I am writing this function for merging two vectors in order. each vector should be in order already before merging, so check that in the beginning. after that...

[3 replies] Last: sorry guys (by dogsu1230)

by jjkrynock

Outputting a zip code as a bar code format

Hello, I've been asked to write a program that outputs a mailing label for a given address. The zip code needs to displayed as a "bar code" at the bottom of...

[5 replies] Last: Thank you a ton AbstractionAnon! (by jjkrynock)

by mrtzz

Back-Pointer

Hey, i'm lacking a proper search term for my problem, so i hope this question hasn't been answered already. So, i have a class called Parent.On instantiation it...

[4 replies] Last: @doug4 yes that makes sense, thanks! If p would be a shared_ptr to par... (by mrtzz)

by raiiiny

Nested Looping Producing Bad Results

I was instructed to create a program that uses nested loops to get 4 quiz scores from any amount of students, output them into a file, and then input them back ...

[8 replies] Last: AHHH. Thank you so much!!! I changed the for loop to this: for (int ... (by raiiiny)

by lililola

recording vidio stream from vlc

hi everyone, i want to do a c++ program that receive a stream from vlc and save it in a disk(D:\\vidéo.mp4)i supose i have to use udp sockets to get this stre...

[no replies]

by StrangeThinker

Finding Username Password and ID in .txt

Working on the log in system for my Text based RPG, where the user can set their username, password and IG Name which are all saved in a plain text file. I need...

[no replies]

by robyn123

C++ code

Write a program that calculates the amount a person would earn over a period of time if his or her salary is one penny the first day, two pennies the second day...

[3 replies] Last: Your for loop is an infinite loop and your braces aren't balanced. Thi... (by booradley60)

by zahra2018

help me with multiplication of two matrix

whats wrong with this program?this program should take all of things in one scanf but its only takes matrix 1.i confused #include<stdio.h> int main() { int ...

[1 reply] : What do you think a construct like this does? for (i = 0; i<m; i++)// ... (by coder777)

by ayati

generic declaration of and acess to member variables (1,2)

Hi everyone, I have a parameter N known at compile time, and a class C (from container) that contain N member variables of different types. My final objective...

[27 replies] Last: > till now the code does not seem to have lot of use. No, it was quit... (by JLBorges)

by kbw

clang: copy elision warning

In recent times I've taken to writing code like: std::string assing(const zmq::message_t& msg) { std::string str((const char*)msg.data(), msg.size()); ...

[8 replies] Last: std::move is implemented as a type cast, but that doesn't mean it does... (by kbw)

by denz

Please can you assist.

A bookshop gives discount to customers as follows:  Students get 10% discount,  Book dealers get 12% discount and  Pensioners get 15% discount.  Al...

[3 replies] Last: Thank you so much guys, this helped me out big time. Much,much appreci... (by denz)

by Beez

Inputing data from .txt file into array

I posted on stack overflow, but everyone just downvotes my questions as I am not a seasoned programmer. I will try to lay it out in a better format. I'm trying ...

[4 replies] Last: cout << "I have just read in the strings " << boys << " and " << gir... (by Moschops)

by DangerousPirate

Luhn Algorithm "Credit Card Validator"

[1 reply] : I cannot get it to provide a correct valid credit card number. You cr... (by kbw)

by Beez

Searching Array to check for matching string

The user inputs a name they want to search for in my arrays if it matches one in the list I want it to output the location in the array that the name is located...

[5 replies] Last: Your function has no return value if the string is not found, so you c... (by Moschops)

by rajhansk

Understanding the vectors

// constructing vectors #include <iostream> #include <vector> int main () { // constructors used in the same order as described above: std::vector<i...

[1 reply] : what is *it, in the above program, it has not even declared... Yeah... (by TheIdeasMan)

by JUAN DENT

Variadic introducing an static for each typename passed

Hi, Having the following variadic template definition: template<typename...Tuples> struct expand; template<typename T, typename...Tuples> struct exp...

[1 reply] : #include <iostream> template < typename... > struct expand ; templa... (by JLBorges)

by DragonflyBeach

Loan Issue

Super frustrated. I'm trying to determine how to do this incremental loan calculator. These are the requirements. Input should be: -Loan. -Amount of ...

[1 reply] : Hi, On line 31, the compiler does integer division before implicitly ... (by TheIdeasMan)

by josheir

Help with code, please. C++ Programmer's Notebook 2nd Edition

I am studying from a book : C++ Programmer's Notebook 2nd Edition by Jim Keough and John Shapley Gray. I am having a problem with pages 438 - 439 : Using a Lin...

[5 replies] Last: Yes exit the loop if the count gets to big, however n increments in a ... (by josheir)

by elephantkid123

Help with strings

jhggh

[1 reply] : Please note that this is not a homework site. We won't do your homewor... (by keskiverto)

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