UNIX/Linux Programming - C++ Forum - September 2011 (Page 2)

Hello! I'm using a linux machine with kde environment on a university, connected to a network. I have a c++ program using gmp and mpfr; compiling it with g++...

[2 replies] Last: Thanks for the reply! But I just figured out that if I change to anoth... (by jorgen)

by Adam Smith

Strange Compiler error at the beginning of header

I am using a header file to declare a class for a queue, which is just a dynamic array and the functions to insert and remove as well as grow the array. The pr...

[4 replies] Last: yeah, I'll do that. This is a just a template that I was using from o... (by Adam Smith)

by coders123

Segmentation fault on deleting a struct

I'm exentending existing C++ application. It have struct as below. struct Message { char z_Date ; char z_Code ; Message() { z_Date = '\0'; ...

[1 reply] : All those temporary buffers and copying without length checking make m... (by kbw)

by lunaticlnt

Error: request for member...

#include <iostream> #include "SalesDB.h" #include <string.h> #include <fstream> #include <iomanip> #include <stdio.h> #include <stdlib.h> using name...

[2 replies] Last: using namespace std; using std::cout; using std::endl; using std::se... (by isnork)

by Shamma

OpenCV error

hello all, I have been coding in python before and included the library of openCV without any problem. Now, I want to code in C++ so I downloaded eclipse an...

[2 replies] Last: If you're new to C++ you may not know this, but in C++ the general pra... (by hanst99)

by zhmsong

about size of outbuff in iconv

hey everyone: I have a question which is about iconv, the following code works well now, but there is still a question to me. char *ComUtil::convertU...

[2 replies] Last: Hey JMJAtlanta: Thanks! I miss the basic usage of strlen()！... (by zhmsong)

by Jest

Help! Compiling Error Message

So I have this code that has a sum function that sums n elements in a vector ... void computeSum (vector<int> &Vec, int howMany, int total, bool success...

[3 replies] Last: I've spruced it up since Now what I have is this for(j=0;j < Vec.siz... (by Jest)

by DimaS

How to enable struct in class ?

Hi folk. I have a class: class Components { struct comps{ // -- Compon base char name ; }; comps *components; int ReadComponents(); int Re...

[5 replies] Last: And now we'd still have to tell him to give the thing a destructor so ... (by hanst99)

by aerowenn

Using gettimeofday() To Measure Performance

This might not be the most optimal way, I'm sure there is a better way, but at least for what I'm doing I need to use the function gettimeofday() to measure exe...

[2 replies] Last: http://pubs.opengroup.org/onlinepubs/007908799/xsh/gettimeofday.html (by kbw)

by shredmaster

c++ and email interaction

Is there a way to import my contacts in my email to a text file so i can manipulate it? output example: Insert email Email: ***@hotmail.com Saving c...

[3 replies] Last: First of all, there is really no specific question you asked. Where, i... (by laserdude11)

by Athanasios Silis

a basic question about declaring variables

Hello everyone, please have a lookk at this snipet of code: https://computing.llnl.gov/tutorials/pthreads/samples/hello_arg3.c it's a webpage in this tut...

[1 reply] : It basically states that passing a struct variable (declared in main(... (by Athar)

by danialgood

is there any way to allocate more memory

i have simulated a queue with pointer "*" but it dont allocate memory that i want and it overflows in about 10800 members can i expand this limit ?

[10 replies] Last: new just throws if not enough memory could be allocated, that saves ... (by hanst99)

by ne555

makefile dependencies issue

I'm having trouble with my hand-made makefile. There is 1 file that is not being created (the last one) It seems to be something about the dependencies of the f...

[3 replies] Last: make is quite sensitive, yes. (by hanst99)

by cciarleg

Posix Threading advice for high rate thread interferance

Hi, I'm looking for the best way to set up a problematic architecture. So far, I have not had success and a variety of failure modes. I have 3 threads (4...

[1 reply] : In my experience, increasing the priority of a thread doesn't increase... (by kbw)

by mgm11

can anyone show me how to input a value into one of my classes and then output it?

#include <iostream> #include <cstdlib> using namespace std; class Temperature { public: static Temperature Fahrenheit (double f); static Tempera...

[5 replies] Last: Thanks for the indication. In my code, the Singleton pattern is not im... (by b2ee)

by nadime

Help linking debug version ( g++ )

Howdy all, I am having a strange problem where my program compiles and links just fine with the -O2 flag set, but it only COMPILES with the -O0 -g flags se...

[3 replies] Last: HALLELUJAH! I updated the code to simply use c_str() where I needed s... (by nadime)

by sbarg

Error Loading Shared Libraries

Hi guys, first post! New to C++, Linux (Ubuntu 10.04) and CodeBlocks and wasn't sure whether to put this into the beginner section or here. Am trying to ...

[5 replies] Last: interactive shell (don't know what that is) It's something that o... (by Moschops)

by McFaraz

C++ Time

i want to get current time but it returns seconds from 1/1/1970. Is there any additional function or method

[1 reply] : Please ask questions only once. http://cplusplus.com/forum/general/501... (by hanst99)

by Petko Ditchev

Segmentation fault tracking bug

Code::Blocks (which i'm pretty sure uses dbg ) doesn't track the place of the segmentation fault properly . When I type "where" or "backtrace" in the debugger ...

[1 reply] : Make sure Code::Blocks isn't trying to start the Release executable wh... (by Athar)

by nima0102

defined typedef in "sys/types.h"

Hi I am newbie in C programming. I am reading source codes and also writing very simple program for test. Almost in every linux program I have seen some types...

[2 replies] Last: That is done because while today size_t might be a synonym for unsigne... (by jsmith)

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UNIX/Linux Programming - September 2011 (Page 2)