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General C++ Programming - September 2015 (Page 17)

Hey guys I'm doing this problem on SPOJ and basically when provided a beginning and end integer limit m and n respectively, it outputs all the prime in that ran...

[2 replies] Last: Ahhh I see I had it all wrong :S I thought I was on to something... I'... (by BarelyOtaku)

by horrificmonster

C++ Instance Methods Cache Friendly?

I've been reading up on design patterns and I had a question about the cache friendliness of methods. Here is some sample code: class a { public: int n...

[5 replies] Last: Ah, that makes sense. I was looking at the cache friendly design patte... (by horrificmonster)

by molma100

Read key input in real-time

I am working on a game in Ogre3D, and have OIS as my input library. I also have 2D graphics to display text glyphs and sprites for the GUI. Right now I am at a ...

[4 replies] Last: I see, alright. As for attempting a solution on my end, I have found a... (by molma100)

by IWishIKnew

Unicode wchar_t -> char

I have to deal with std::wstring encoded in unicode. I need to be able to convert is to std::string (wchar_t -> char). So far, I've tried std::wstring_conve...

[1 reply] : Works for me: #include <iostream> #include <string> #include <codecv... (by helios)

by Ahmad1797

Multiple .cpp and .h files with constants

Hello, How can I define a constant which can be accessed to any .h or . cpp file in the project? My efforts are: //MAIN.CPP #include "FILE1.h" #include "FILE...

[15 replies] Last: [quote=Duoas]That doesn't undo the bad advice given before constexpr w... (by Peter87)

by wh1t3crayon

How can I recycle pointers to use for different object's parameters upon creation?

So let's say I have a few class objects, and this class owns a pointer to a Base component. I use pointers to take advantage of polymorphism. For simplicity, le...

[10 replies] Last: that means you get another behavior but the location in memory for Co... (by MiiNiPaa)

by Tommy98

all (3 digits permutations) of array with n elements

thank you it is finished

[3 replies] Last: the thing u said me did just the permutations of first 3 elements it ... (by MiiNiPaa)

by homing

container vs built-in array

Hey, As far as i know it's more preferred to use containers than the built-in arrays. I've always followed the advice but how about performance between these b...

[6 replies] Last: It depends on your design . With static/automatic arrays std::array ... (by MiiNiPaa)

by rathpanha

Warning fseek in binary file

#include<conio.h> #include<iostream> #include<fstream> #include<stdlib.h> #include "antheader.h"//this is my own header to use wiht gotoxy #include<string.h> u...

[2 replies] Last: Oh thank you alot it's work. (by rathpanha)

by BigMike

General Debug Error (Bit-Version etc.)

Dear Community, at first excurse my simple and may wrong english. I want to know everybody can help me for my problem. Few days ago I installed visual st...

[1 reply] : https://support.microsoft.com/en-us/kb/2757355 (by MiiNiPaa)

by radar114

Can somebody help me explain this function?

Hello! I need some help to understand this function. Why a two dimension vector is needed here? Thank you in advance! void output_results(const vector<st...

[4 replies] Last: No, I forgot to do that. That's the problem. Thank you for reminding m... (by radar114)

by Tommy98

Creating a Triangle From array

thank you its finished

[6 replies] Last: Answering here instead of private message: firs of all, throw out your... (by MiiNiPaa)

by HOWDOIAIM

CodeBlocks SDL: "ld.exe cannot find -lSDLmain"

I had installed SDL with this tutorial http://lazyfoo.net/tutorials/SDL/01_hello_SDL/windows/codeblocks/index.php and as far as I know, everything works e...

[7 replies] Last: I'm an idiot. I just realized that the global compiler setting were s... (by HOWDOIAIM)

by mk92595

First Time C++ Coder: Need Help With One Little Part (loop)

For my project, I need to make a program that would ask for a dollar amount for bottles that cost $2 and for every 5 bottles, the user would receive a free bott...

[2 replies] Last: Thank you but I solved it! (by mk92595)

by deadhorizon176

Random arrays compiler issue

The program I created is suppose to work as follows. Program takes an array with predetermined values on it (in this case it takes the values of a deck of ca...

[1 reply] : You should only call srand once in your program. At the beginning of m... (by Peter87)

by Micard

SDL 1.2 to SDL 2.0 - rotozoomsurface

Hi! So I'm rewriting this piece of code to SDL 2.0. I think I'm doing okay except for the part with rotozoomsurface. Since I've got rid of all the surfaces, how...

[1 reply] : If you want to use rotozoom you should load the image as a surface tha... (by Peter87)

by Roneel

This program gets ID marks from a txt file and determines grade. how to pass the void print_students_records function.

#include <iostream> #include <fstream> #include <cstdlib> #include <string> using namespace std; const int MAX_SIZE = 10; class student{ publi...

[1 reply] : void print_students_records(string s ,int size); student s ; print_s... (by ne555)

by Tommy98

looking if its possible to make given number from int array of numbers

done

[6 replies] Last: ¿and that's a problem because...? Now the only beneficiary would not ... (by ne555)

by Tommy98

sum of numbers in one line

done ,

[1 reply] : http://www.cplusplus.com/articles/oGLN8vqX/ (by Radar)

by CpluspProgrammer

Qt Cannot open file 'shell32.lib'

Hey guys, I'm trying to compile a simple qt application and I get the follow error message: cannot open file 'shell32.lib'. Any ideas on how to fix this? I've b...

[no replies]

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