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General C++ Programming - September 2014 (Page 21)

Code::Blocks doesn't recognize C++11 !!!

I'm trying to use c++11 std::thread, including <thread> header, but it says this: error: 'thread' is not a member of 'std' I checked the flag -std=c++11 in ...

[2 replies] Last: The default codeblocks compiler doesn't support std::thread (by Yanson)

by DevTK

Virtual & Template method

I have the same implementation for 2 methods, they both insert argument to a text file. void WriteToFile( double content) //for double { streamFil...

[5 replies] Last: One can do the other way too: class base { virtual void write_impl(... (by keskiverto)

by jcra1992

Help with 2 dimension array of char

#include<iostream> using namespace std; int main(){ int size_col = 12; int size_row = 12; char months_array = { "January", "February", "Ma...

[7 replies] Last: I'll take just some bits: check_low = rainfall_array ; int lowestMont... (by keskiverto)

by jonmackey22

Building a simple program? Help with output

I am building a simple program that finds the average of three grades. The program runs fine. But, I am trying get my answer stored in fixed point notation with...

[6 replies] Last: Shouldn't it be cout<<std::setprecision(2);?? I don't know, I've nev... (by TheBeardedQuack)

by Gyiove

Creating costom function param header and passing that.

Hello cplusplus forum, I have this here: int *funclist; int func_count = 0; void push_func( int func ) { if( func_count == 0 ) funclist = new int ; ...

[8 replies] Last: > Basically i want to create a dynamic function params header i guess.... (by JLBorges)

by MazharMustapha

Matrices #2- Please Help Fellow Programmers!

#include <iostream> #include <cstdlib> #include <iomanip> using namespace std; char menu(char); int row, col; int main() { int temp; char op, se...

[3 replies] Last: Arrays other than one-dimensional are a bit tricky. There are third-p... (by keskiverto)

by wh1t3crayon

Cannot access private member declared in one class BUT I can in another class (1,2)

So I have an ImageManager class, Board class, and Box class. In Board.h I can declare ImageManager imgr; and in Board's constructor I can use imgr and its fun...

[26 replies] Last: Passing by reference is efficient for anything larger than primitive t... (by LB)

by gopal2773

Which is Best Encryption Algorithm

Hi, I am working client server data transfer project. I need one help for encrypt and decrypt the data. Which encryption method is best? is unbreakable? Why ...

[1 reply] : https://konklone.com/post/why-google-is-hurrying-the-web-to-kill-sha-1 (by mutexe)

by gopal2773

MD5 Encryption and Decryption

Hi, how to do encrypt and decrypt the text by using md5 algorithm without using the any library? Only implement in c++ program.

[4 replies] Last: Thanks guys. i understand the md5 hash algorithm (by gopal2773)

by fang2

Need tutorial on writing this program please

I have to do this program on Visual studio. Some help would be appreciated please: Write a program that prompts the user to input a four-digit positive inte...

[6 replies] Last: Won't this work?? #include <iostream> int main() { int n = 4; ... (by avadhootp)

by hakeris1010

Using resources in executable.

i have seen a lot of programs that have images inside their exe, dont use external ones. I tried to add image in my codeblocks project, but trying to use it fai...

[2 replies] Last: Personally i use windows, but i want a cross-platform answer (if it is... (by hakeris1010)

by Kubani

How to make a shape outside of main()

Hi, I know how to define a shape and attach it to a window as follows: #include <Simple_window.h> void cir() { Circle c(Point(100,100),50); } int main() {...

[4 replies] Last: That answer is a kind of else question! Also (as I said) I want use of... (by Kubani)

by MazharMustapha

Matrix Operations - Help !

#include <iostream> #include <cstdlib> #include <iomanip> using namespace std; char menu(char); int main() { int row, col; float A , B , C ; ...

[3 replies] Last: never mind, i found the problem. Thanks so much ! : )) (by MazharMustapha)

by sebz92

duplicate array

hello all, I'm trying to duplicate a string array. i created a function called duplicate but, when i run it, it gives me an error... what is wrong with it? ...

[3 replies] Last: The duplicate is completely independent of the original. First string... (by Chervil)

by roger911

Time

I need a method of syncing time between server and client for udp packet timestamps that are accurate to within 10ms. I know about ctime, and other such libs...

[3 replies] Last: > wouldn't it be possible if you used an external source for atomic cl... (by JLBorges)

by primem0ver

Problem with abstract classes and inheritance

I am having a problem with a set of inherited classes and I cannot figure out why. Here is the relevant code (with class names changed). (Each separate code f...

[4 replies] Last: You should use public inheritance, but I guess that is just another m... (by primem0ver)

by shoqi

Multi dimentional Arrays.

Write a program to enter data into a table and display on the screen in tabular form. Please check my code below. I want to know where are the errors. Thanks i...

[3 replies] Last: Could you copy and paste the exact errors you are getting? (by LB)

by UniqueZ

Low level callback hook issue

static LRESULT CALLBACK kbProc(int code, WPARAM wParam, LPARAM lParam) { if (code >= 0) { kb = reinterpret_cast<PKBDLLHOOKSTRUCT>(lParam); vkCode = k...

[3 replies] Last: Oh my god why no reply? (by UniqueZ)

by nicow

std::forward : 'forward' is not a member of 'std'

Good evening everybody, I am pretty new to C++, and still seem to be very attracted to pitfalls. Inspired by this article(http://enki-tech.blogspot.ch/2012/0...

[3 replies] Last: > It now turns into an error if I explicitely add -std=c++11 It sho... (by JLBorges)

by sya0524

Get out from loop

Anyone know how to get out from loop. I mean when we press -1 value, it stops. #include<stdio.h> #define CD 0.05 #define LD 0.06 #define MD 0.07 float Ge...

[1 reply] : Please, use code tags and informative indentation. See http://www.cplu... (by keskiverto)

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