General C++ Programming - C++ Forum

how do I resize dynamic array without using loop? (And I dont want too use std::vector). loop version: int size = 10; int* arr = new int ; void resize(...

[7 replies] Last: Oh yeah, I should not use a new with a malloc. sorry... (by canilao)

by natasha23

generate a deck of cards

hay guys im having rouble with generating a deck of cards...im not really sure exactly how i should do it and i was wondering if i could get some help im using ...

[3 replies] Last: canilao has described one possibility. But a card can be uniquely defi... (by Hammurabi)

by graciano

string to int conversion

Hi! I used atoi from stdlib to manage this conversion ... something like this. #include <string> #include <cstdlib> ... int x ; string s; ...

[5 replies] Last: also #include <boost/lexical_cast.hpp> int n = boost::lexical... (by jsmith)

by Disch

Get app path+name

Looking for a way to get the executable's full path and filename. *nix solutions in particular, but Windows solutions, if you have them handy, would also be ni...

[5 replies] Last: Yes, if your application is in a PATH directory you'll have to search ... (by Duthomhas)

by vkq123

Function pointers

Hi can somebody explain me what this function pointer means... void *(*(*fp1)(int)) ; As I understand this means its is a pointer to a function which ta...

[13 replies] Last: Thanks guys. :)... i understand this was a very difficult one... and t... (by vkq123)

by Incubbus

Winsock & Threads

Hey There... I am writing a small chat program: 1 host, multiple clients. I managed the message-receiving with an FD_SET and select() to check for new con...

[4 replies] Last: Do you realize any solution , how i could get all the Clients stuff ov... (by Incubbus)

by Karami

unexpected output from binary file.

void read () { int buff; fstream bin ("fails.bin", ios::in); while (bin) { bin.read ((char*)&buff, sizeof(int)); cout<<"stat...

[3 replies] Last: Use a struct of 4 ints and read all four ints in at once into the stru... (by PanGalactic)

by Kruptomenos

GUI Windows && Linux

Okay, I'm thinking about learning C++, but I was wondering if it was possible to make a GUI using C++, but it has to be able to run on both Windows and Linux(...

[2 replies] Last: Why it's very possible.And very recommended.This way you won't support... (by andrei c)

by nanger

about escape character "\b"

for(....) { fprintf(fp,"%d ",..); } fprintf(fp,"\b\n"); as the codes above show, I want to cancel the last blank using \b and then line feed but...

[5 replies] Last: thanks very much for the detailed descriptions! (by nanger)

by Sundar0206

Assistance needed with NAN

Hi all Yet another question from me and hope some one shoots the answer immediately.. very simple though I have been tryin to do a rigid body simulation ....

[2 replies] Last: bang on target........ thanks.. that was the problem .. but now an... (by Sundar0206)

by nanger

what is wrong with my program?

Peer::add_link (this=0x8077398, dest=0x80f6630) at /usr/include/c++/4.2/bits/stl_deque.h:1055 1055 if (this->_M_impl._M_finish._M_cur (gdb) s 56 p_...

[11 replies] Last: I haven't modified p_out_links class Link { PPeer l_to; //... (by nanger)

by ajay16oct

Static Casting is not working.What can be bug in it?

hi everybody . I am trying to use static casting to downcast it .but its not working.Plz help me to find the bug in it . #include<iostream> #include<typein...

[6 replies] Last: I don't often use typeid() (by "often" I mean "ever"), so I had to lo... (by Disch)

by nanger

erros in debugging

void make_random_neighbourhood(POverlay po, size_t degree) { size_t n = po->num_peers(); for (size_t i = 0; i < n; i++) { size_t k = 0; while (k <...

[4 replies] Last: What level optimization level did you compile at? The compiler will f... (by PanGalactic)

by graciano

flush cin

Hi How can i flush cin so that i can read a string with spaces after reading an int? #include <iostream> #include <string> using namespace std; int main()...

[4 replies] Last: That's more like it. Thanks (by graciano)

by shobhitgoel10

inpout32 in Turbo C ??

Hi I am developing a project that hass to access the pc parallel port in windows xp, through Turbo C/C++.. I know u cannot access the port directly in XP but...

[no replies]

by Mozza314

Reserve Memory for GMP Integers?

I'm working on an algorithm which calculates the square root of 2 to many decimal places. I'm iterating a pair of integers which get very large, and I think I h...

[2 replies] Last: I have read the relevant sections of TFM and strangely enough, there's... (by Mozza314)

by Repentinus

Including scripting support in C++ application

Hi! What scripting language would You recommend from the set of Python, Common Lisp, Scheme to be used in a C++ application? The main aspect to consider should ...

[10 replies] Last: Got it working. Thanks. (by Repentinus)

by matrebatre

Function pointer question

I found this code in an open-source project: char* address; // (...) return (void*)*(unsigned int**)(address+0x44); What does this mean?

[1 reply] : that casts address+0x44 to a pointer to pointer to unsigned int and ... (by Bazzy)

by failingphysicsz

c++ class implication problem

Question Details: I am having difficulty implimenting these umls. I dont even know how to start. Please help. uml1 Item -string name -int cost -int quant...

[no replies]

by matrebatre

What should I do if malloc() fails?

I was wondering what I am supposed to do if malloc() returns NULL. Currently the program shows an error message to the user, and stops with whatever it was doin...

[4 replies] Last: In my experience (UNIX) it is MOST important to handle malloc failures... (by jfq722)

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General C++ Programming - May 2009 (Page 8)