C++

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UNIX/Linux Programming - June 2012 (Page 2)

i have added a module to ns2 and i am compiling it when i get undefined reference error. g++ -lneoclassic -lrt -o ns \ common/tclAppInit.o tools/rand...

[1 reply] : after adding lxml2 library to linker flag i was past few of the errors... (by hasanalikhattak)

by cagdaskurt

can not compiling the c++ project

Hello guys, I need to develop my own peap protocol. I've found some source code to inspect, but i dont know how to compile it. In Linux? In Visual Studio C...

[1 reply] : hi, i saw the two source code who has it's makefile. In Linux,you can... (by evefree2)

by evefree2

how to write a map or vector into a file

hi guys, i have a problem in my prog which is that i want to write a map or a vector into a file. here: map<string,string> tmp; map<uint32_t,vector<int>...

[4 replies] Last: thanks normvcr,i see. and now,i've done. (by evefree2)

by alend

delete heap after returning pointer

Hi all, I have a function as follow: int* readFile(string InputPath) { int *myvar = new int ; //The file has 10 lines (Using heap) ifstream ...

[16 replies] Last: ^Actually, you probably want to pass in a parameter to the FreeDynamic... (by firedraco)

by dolle39

Problem with char array or string

Im having a problem. I want to store some text (names) in an array. However, I cant get it to work. The code for the small function can be seen below. Note lin...

[2 replies] Last: Yes it is. I finally realised the problems after a 1 day of considerat... (by dolle39)

by Eric99

mmap with files >2GB

I've been trying to get mmap to work on a 3GB file (Linux Ubuntu 12.04), but it keeps returning MAP_FAILED. If I ignore it, I eventually get a segmentation fau...

[5 replies] Last: mmap maps the file into your virtual address space, which has a size o... (by Athar)

by mhalf7

startup process

hello masters.. I honestly don't have any idea in accessing or timing the running program in my OS..that's why I'm having a hard time in writing a program th...

[1 reply] : There's already a standard utility to time programs. http://www.freebs... (by kbw)

by SmallTock

How to use GCC from console?

I'd like to know how to compile with gcc in a terminal just in case if I need to...so any advice?

[7 replies] Last: The reason to use makefiles is to avoid recompilation. As long as the ... (by ne555)

by breadbread1984

question about template class

I met a error when running the program. The error is *** glibc detected *** ./a.out: double free or corruption (fasttop): 0x0000000000c19050 *** the cod...

[5 replies] Last: Yes that copy is incorrect, I missed that. That templated thing doesn... (by kbw)

by SmallTock

Linux Binary Extension

I have been told multiple times over the internet that a linux binary has the ".elf" postfix. However, all the programs that I've compiled/linked have been spa...

[2 replies] Last: Thank you for explaining. When I 'hacked' my Nintendo Wii a few years... (by SmallTock)

by Chris Christoff

How to tell who accessed file

Hi, My apologies in advance that this is only loosely related to C++, but I don't know a better place to ask it. Normally, I would ask it on Stack Overflow, bu...

[1 reply] : No. Only the access time is maintained, and even that can be switched... (by kbw)

by deritha

undefined reference to 'function'

I write a brief code to call an exist class and always was told "undefined reference to `T::T(char*)' and undefined reference to `T::~T()'... The main functio...

[6 replies] Last: Thanks ne555. I found it's because the name of T.C ... The Makefile ... (by deritha)

by helterskelter

System call overhead

Hi I know there are many programming gurus who say no-no to invoking system calls because of overheads and what not. But the way I see it, if I am to run a rel...

[3 replies] Last: So how is it faster? You Should actually NEVER use system. You can cre... (by S G H)

by Chris Christoff

Input file?

Hi, I made a program that finds the root of a quadratic equation. I want to speed up my testing since I want to try alot of different senarios. My program tak...

[no replies]

by Sintax

How to compile for Windows under Linux? (1,2)

Let's say I am running linux and my friend is running Windows. I want to compile my program into a Windows ".exe" file rather than a linux binary. How do I go...

[20 replies] Last: WOOHOO!!! Thank you all! I finally got it to work!!!! PS: It was Pet... (by Sintax)

by hasanalikhattak

undefined reference to 'function'

i want to use one program as a shared library for an other program. i started as follows: i have a application which i have compiled using /usr/bin/g+...

[6 replies] Last: /usr/lib/ should be already on the lib path. What if the lib is in /... (by S G H)

by straygrey

Simple program segment faulting

I have the following simple C program giving segmentation fault and for the life of me I cannot see why. #include <stdlib.h> #include <stdio.h> int main(i...

[4 replies] Last: Thank you. (by straygrey)

by celoz0828

Radix Sort Negative Numbers

So I have to write a program that performs radix sort. I have radix sort working. but only with positive numbers. I need to write a function called in the code ...

[1 reply] : A signed 32 bit integer goes from −2,147,483,648 to 2,147,483,647 an... (by mik2718)

by Bella

Finding mean of the doubles using vector!

Hi, I'm new to C++... I need to write a C++ code for taking values of 'x' and 'y' coordinates from the user using a space between the two values of the pai...

[1 reply] : just for finding the mean you don't need to store all the numbers. the... (by vkrishan)

by mIXpRo

installing an older version of g++ on ubuntu 12.04

can someone guide me on how to install g++ say 3.6 version on ubuntu 12.04 which runs 4.x ?

[4 replies] Last: Try this article - it may help. http://ubuntuforums.org/showthread.ph... (by budman85)

June 2012 Pages: 123

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