Hi I'd like to check if a binary number has a '0' or a '1' at a specific position. example: if the binary number is: 101000100 checking at position zero (that is at the rightmost '0') should result in '0'. checking at position 2 should result in '1'. checking at position 3 should result in '0'. checking at position 6 should result i...
Using the latest gcc compiler, do I still have to think about these types of manual loop optimizations, or will the compiler take care of them for me well enough? ...
I've never programmed using C or whatever but I use this site a lot so as you can imagine I run into them quite a lot. And due to the fact I don't really understand the languages this is a question Google can't really answer. So in simple terms what are the differences between each of these languages. I assume they are related. All I kn...
I am using GCC, what switches do I need to add to link with Xlib? After searching, all I could find was -lX11, but that gave me ld: library not found for -lX11 I am using a mac (10.6), but I would not like anything that is Mac specific. ...
I am getting this eror from Visual C++: HEAP[ShockRay3.exe]: Heap block at 00557018 modified at 00557044 past requested size of 24 This occurs when I add a line of code between two recursive calls in a function. All the line of code does is changes a pointer but for some reason every time I put it in, I get this error. This is a simpl...
I have to capture the stdout in a program and write that into a file...so I created a pipe. In the parent process, I captured the stdout in the pipe using dup() and I need to get this into a file...so I did a dup() in the child to get the captured file descriptor into the stdin. Now, how do I write this stdin into a file using fwrite()?...
In windows is it possible to know what kind of disk we are dealing with from a c/c++ program? forget about gpt or mbr, how to know whether it is basic or dynamic? Program input can be drive letter or any info related to disk, output should be dynamic or basic. No need of a direct way of doing, even if it is lengthy process, its okay. I c...
I've become more and more comfortable programming in Java than with C++ or C. I am hoping to get a sense of the performance hit incurred using a JVM interpreter, as opposed to executing the same "project" natively. I realize that there is some level of subjectivity here; the quality of the program will depend highly on a good implement...
i basically want to take int name and string age from user in c# and send it to dll method written in c which take int and char[50] arguments in it and return string .i created following scenario but i am failed ,any body has the code i have a dll developed in c which ahas a structure struct Argument { int age; char name[50]; } ; ...
Hello, I'm checkng whether a file has been modified or not in order to refresh the content... However, i need a couple improvements : - How do I test the return value of stat to tell if it failed ? - The returned errno numbers may change between glibc versions, right ? in this case it is useless to do errno==... How do I fix that ? Pl...
Simple question really.. I'm just starting out programming with Xcode and I'm creating a simple ANSI C program and the Xcode book I'm reading says to include c.h because it defines true and false for you among other things. I don't have c.h though and I'm wondering if it's a big deal or not. How can I solve this problem? ...
I want to have a deeper understanding of how C programmes are run. But IDEs stops us from doing that. So is it possible that I manually set up the environment and write code in text editors, and finally run it in a prompt? If the answer is yes, how? ...
I just looked at the definition of HRESULT in VS2008. WinNT.h has the following line: typedef __success(return >= 0) long HRESULT; What exactly does it mean? It doesn't even look like C or C++ to my untrained eye ...
Hello, I need to use libcurl for creating a folder in my home directory. I use the following set of code for this: struct curl_slist *headers = NULL; headers = curl_slist_append(headers, "mkdir MyFolder"); curl_easy_setopt(curl, CURLOPT_QUOTE, headers); I have given the ftp server-path, user name, password. But, I get the error '5...
Hi, Just trying out some C on some of the project euler questions. My question is why am I getting a floating point exception at run time on the following code? #include <stdio.h> main() { int sum; int counter; sum = 0; counter = 0; for (counter = 0; counter <= 1000; counter++) { if (1000 % counter == 0) { sum = sum...
Hi, I was studying trees and everything seem fine until i started a avl tree, which requires rotation. I built a rotation algorithm that works fine until the 2 or 3 rotation, the algorithm it's the following: static void _nodeRotateRight(avl_tree* t, avl_tree_node** n) { avl_tree_node* node = (*n)->left; // refresh parents before rota...
Question says it all but here is an example: typedef struct mutable_t{ int count, max; void **data; } mutable_t; void pushMutable(mutable_t *m, void *object) { if(m->count == m->max){ m->max *= 2; m->data = realloc(m->data, m->max * sizeof(void*)); } // how to handle oom?? m->data[m->count++] = ...
I'm interested in different aspects of portability (as you can see when browsing my other questions), so I read a lot about it. Quite often, I read/hear that Code should be written in a way that makes it compilable on different compilers. Without any real life experience with gcc / g++, it seems to me that it supports every major platf...
I have a function which is passed a list of ints, until one value is "-1" and calculates the minimum. If the function gets called couple times, it is supposed to return the minimum between all calls. So I wrote something like that: int min_call(int num, ...) { va_list argptr; int number; va_start(argptr, num); //stat...
This might be a dumb question, but maybe someone can provide some insight. I have some global variables defined in a header file (yes yes I know that's bad, but this is just a hypothetical situation). I include this header file in two source files, which are then compiled into two object files. The global symbols are not referenced anyw...