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General C++ Programming - January 2016 (Page 3)

Hi, I have a variadic template factory function that accepts an unknown number of arguments. This is supposed to call a private constructor, but I don't know...

[3 replies] Last: if you omit the forward, you might be copying where you could have mov... (by Cubbi)

by pnoid

Assertion failed error with opencv

I'm trying to select a region of an image with opencv but I randomly get this assertion failed error: OpenCV Error: Assertion failed (y == 0 || (data && dims ...

[2 replies] Last: Thanks so much. I can't believe I missed that. (by pnoid)

by corneliusV

Convert temperature between celsius and fahrenheit

I am supposed to write a program that allows the user to convert a temperature either from celsius to fahrenheit or fahrenheit to celsius and use separate funct...

[2 replies] Last: You have several issues with your code: 1. You are calling functions... (by closed account E0p9LyTq)

by keanedawg

Testing a bad allocation?

I want to test some of the exception handling in my program, but it's hard to do. I will almost never have a bad allocation. Is there a way to debug in the spe...

[3 replies] Last: [quote=keanedawg]I want to test some of the exception handling in my p... (by closed account E0p9LyTq)

by JUAN DENT

making a lambda template...

Hi, I wanted to create a template lambda so that I do not have to re-define this behaviour for each possible type.. like so: ///// want to avoid this: ...

[4 replies] Last: Ok, yes I know I can use a function object... but, I wanted to see how... (by JUAN DENT)

by tommy venice

distance between two atoms

Dear all, I am newbie in programming language, especially in C++. My problem is the following: i would like to read an external .txt file which contains th...

[10 replies] Last: in case I will paste here the piece of code Please, use code tags. S... (by keskiverto)

by michellee

From structure to array

Hi. i have this code and I want to put all the information input into an array and find the highest salary input. How could I do it? Thanks. struct person ...

[4 replies] Last: Okay thanks! I even found the min value of the salary! Thanks a lot! (by michellee)

by mike9407

linked list

linked list need copy constructor?

[2 replies] Last: Bjarne Stroustrup: Why you should avoid Linked Lists https://www.yout... (by Thomas1965)

by zemnieks

Program that turns decimal base to any base from 2-16 gives reverse number

Hello! I am trying to make a program that turns any number with decimal base in number with any base from 2-16, but the program I have written gives me the numb...

[2 replies] Last: Another option would itoa. http://www.cplusplus.com/reference/cstdlib/... (by Thomas1965)

by bambam

Finding Mode with no Arrays!

Hi guys, noob programmer here, so anyway, my professor gave us an assignment this week and i'm just stumped on it - i'm sure it's a really simple solution, cuz ...

[4 replies] Last: If possible, please post the exact text of the assignment. I suspect ... (by dhayden)

by Kubani

a strange pointer error

Hi, Would you please have a look at this simple code (its name is test1 )? I don't know why my VS 2015 compiler gives an error :( #include <iostream> using ...

[3 replies] Last: cpp.sh runs it successfully! This code has no successful behaviour,... (by Moschops)

by a10e29

raw pointer to unique_ptr

Hello, Is it possible to convert a raw pointer to a unique_ptr? If so how would I do that? Thanks in advance

[1 reply] : Hi, Not sure about converting, but a unique_ptr can own a pointer... (by TheIdeasMan)

by tigerlilycnm

Psuedorandom Code generator

javascript:tx('Having some difficulties with a program. The purpose of the program is to generate psuedorandom numbers. The first set of numbers is random. T...

[2 replies] Last: - Why not use constructor initialiser lists? http://en.cppreference.co... (by integralfx)

by densel12

Volume of cone using structures and pointers

Im writing a program about calculating the volume of a cone using pointers and structures. Here are the directions: ----------------------------------------...

[2 replies] Last: - Your input prototype doesn't match your implementation. //void i... (by integralfx)

by lillybug

Using C++ for experiment

Hi, I need to get this code to ask for the initial speed, omega. I understand it would need a prinf statement followed by scanf, but do not know what to include...

[11 replies] Last: Hi, according to our lecturer we have to have it starting with the #in... (by lillybug)

by nameishi

using merge from the algorithm library

Could use some help trying to implement these two vectors using merge I get an error on line 28...i got back_inserter from some sight i was researching -A...

[5 replies] Last: If you can't be bothered to post the actual error messages (preferably... (by cire)

by Kubani

Creating graphical apps in C++

Hi all, If we want to create Android and iOS apps and also be able to create Windows apps as well as apps for cross-platform systems like various devices and...

[8 replies] Last: Sorry I don't have any detailed info on Qt and I don't know these. Do... (by Thomas1965)

by kaspermv

expected primary-expression before ')' token

im a beginner programmer in c++ and i am haveing this problem and dont know what to do.(last line) http://puu.sh/mKElD/b58a377d02.png the code: #inclu...

[7 replies] Last: Then add the missing braces after line 78. I can't do it for you. (by coder777)

by PirateNeko

Merge sort

I want to do a half merge sort, that will start from the elements of the vector What i want to do: ->Organize the elements from lower to highest How will I d...

[1 reply] : Please use code tags when posting code. Highlight the code and press ... (by dhayden)

by Quark

An implementation issue: Polymorphic types and separate compilation (1,2)

Hi there, I have a problem that is not related to how C++ is seen from the ISO standard point of view (external) but this is an implementation issue (internal)...

[36 replies] Last: There is no interoperability between binaries compiled by different ... (by helios)

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