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help needed with void pointers.
Hi, I'm trying to create a generic link list. Here's the data structure for node: Code: typedef struct node_s { void *data; struct node_s *next; }node; Now let's say I want the data pointer to point to a vector structre: Code: typedef struct { double coord[3]; }vector; I can assign dat... 2 Jul 2008 06:45

Crashes on a NULL pointer
I'm learning the C language by writing a simple extension for PHP that generates image thumbnails. I am also using GD for image manipulation and file management. I keep running into a NULL pointer on the line where I am writing the image to the disk. I inspected the values of im and fp and both are non-NULL.... 2 Jul 2008 03:42

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Array "division"
I have two numbers each has 100 digits, emplemented in 2 arrays of integers for example: 1. short a[100] = {9,8,7,6,5,4,3,2,1,.....} 2. short b[100] = {1,2,3,4,5,6,7,8,9,.....} How can I divide a and b to get real numbers c(a/b) and d(a%c) as arrays? Will appreciate if someone give me high level alghoritm or just... 27 Jun 2008 03:56

Simple Thread Class using posix threads
It's my first post on this list.. can anyone help me? i have a very simple class that creates threads on linux, but it doesnt work. i tried this code and using 'extern "C" void* functionToRun(void* argc);' but this one shows a linker error. code: ========= Runnable.h ============== #include <iostream> #ifndef... 26 Jun 2008 06:22

Simple problem, don't get it
Hi , I am self studyign "Essential c++" which gives the following problem and code. I don't get the code: the condition in the while statement uses cin, but shouldsn't you input a variable using cin and then use it with the while loop? Also how does cin>>while satisfy the problem? i tried running the code as giv... 26 Jun 2008 07:23

file write
Hello group members, i am a newbie and trying to write array values to a file. array values are dynamic so i need to create file first and later append the values here is the code i tried... the file is created but it is empty can any one help.... void filewrite (unsigned int *sad, unsigned char *p... 25 Jul 2008 08:22

Heap corruption detected!!
I am reading the "C++ Primer, 4th Edition". I compiled the following codes, // C-style character string implementation const char *pc = "a very long literal string"; const size_t len = strlen(pc +1); // space to allocate // performance test on string al... 24 Jun 2008 23:37

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Division result is always 100 instead of 99.99
Hi All, My coding have following stmt in which I divide large number say X by number y which is sligthly greater then X. Say Y = X + 1 double successRate = 0; double passedCandidates = 10000000 ; double failedCandidates = 1; sucessRate = (passedCandidates * 100) / ( passedCandidates + failedCandidates... 25 Jun 2008 10:52