As a C++ programmer I have now decided to learn C to have "more control" over what I write. Are there any syntactical features in C which lead to rather unpredictable assembler code? Like virtual functions in C++ Is C disguised assembler? I would quite like that idea. ...
I am a total beginner and would like to eventually learn to develop for the iphone. I have just done a beginner's CS course where the language we learned was JavaScript. We studied basic concepts like: variables, arrays, loops (for,while,if,if..else..), properties and functions. I'm wondering if I am starting in the right/wrong place b...
I am developing a progress bar using Ajax. My client side code is working fine, but I have issue at server side. I am using C based CGI. if(i == inc && pb_inc<=100) { fptr = fopen("progress_bar.txt", "w"); fprintf(fptr,"%d", j); fclose(fptr); pb_inc++; } basically I am increasing progress bar after certain number of bytes. What I see ...
I have an Objective-C class (although I don't believe this is anything Obj-C specific) that I am using to write a video out to disk from a series of CGImages. (The code I am using at the top to get the pixel data comes right from Apple: http://developer.apple.com/mac/library/qa/qa2007/qa1509.html). I successfully create the codec and con...
Hello, before I ask anything, just letting everyone know that this is for fun and I have posted all of my code that I have so far; will post more as things are fixed/implemented), sorry for the lengthy post! I have two questions here and I will post all of my code below. - 1) I can't seem to figure out why when inputting 12+ letters wi...
(in c90) (linux) input: sqrt(2 - sin(3*A/B)^2.5) + 0.5*(C*~(D) + 3.11 +B) a b /*there are values for a,b,c,d */ c d input: cos(2 - asin(3*A/B)^2.5) +cos(0.5*(C*~(D)) + 3.11 +B) a b /*there are values for a,b,c,d */ c d input: sqrt(2 - sin(3*A/B)^2.5)/(0.5*(C*~(D)) + sin(3.11) +ln(B)) /*max lenght of formula is 250 characters...
I've spent the last few hours trying to port this to C, with no success. Can someone please help? function zerofill($a, $b) { $z = hexdec(80000000); if ($z & $a) { $a = ($a>>1); $a &= (~$z); $a |= 0x40000000; $a = ($a>>($b-1)); } else { $a = ($a>>$b); } return $a; } ...
In this article : http://publib.boulder.ibm.com/infocenter/macxhelp/v6v81/index.jsp?topic=/com.ibm.vacpp6m.doc/language/ref/clrc03defst.htm What's means the sentence "In C, a structure member may be of any type except "function returning T" (for some type T)" Thanks for all the answers! ...
I read about Endianness and understood squat... so I wrote this main() { int k = 0xA5B9BF9F; BYTE *b = (BYTE*)&k; //value at *b is 9f b++; //value at *b is BF b++; //value at *b is B9 b++; //value at *b is A5 } k was equal to A5 B9 BF 9F and (byte)pointer "walk" o/p was 9F BF b9 A5 so I get it byte...
I am trying to encode a string in hex8 using c. The script I have right now is: int hex8 (char str) { str = printf("%x", str); if(strlen(str) == 1) { return printf("%s", "0", str); } else { return str; } } In this function, I will need to add a 0 ahead of the string if the length is less than 1. I don't know why I'm getting: p...
I need to be able to determine if two sounds are very similar. The goal is to have a very limited vocabulary (10 or 15) of short one or two syllable words, then compare a captured sound to determine if it is one of those items with all the usual variability in environmental and capture conditions. The idea is that the user can issue a fe...
Hello! Trying to understand why this doesn't work. I keep getting the following errors: left of '->nextNode' must point to class/struct/union/generic type (Also all the lines with a -> in the function new_math_struct) Header file #ifndef MSTRUCT_H #define MSTRUCT_H #define PLUS 0 #define MINUS 1 #define DIVIDE 2 #defi...
I have a C++ Windows program. I have a text file that has some data. Currently, the text file is a separate file, and it is loaded at runtime and parsed. How is it possible to embed this into the binary as a resource? ...
In C, I would like to limit the string to the first 8 characters. For example, I have: char out = printf("%c", str); How can I make it so it only returns the first 8 characters? ...
Hello, I was wondering if you knew of a robust implementation of a hashtable in C. I'm looking for something other than ghashtable in glib. Thanks. ...
Assume I have the following: typedef struct { char *name; char binding; int address; } Fn_Symbol //definition of function symbol static Fn_Symbol *fnSymbols; //array of function symbols in a file statc int total; //number of symbol functions in the array and file static void PrintBacktrace(int sigum, siginfo_t ...
Hello, gcc 4.4.4 c89 My program does a lot of string coping. I don't want to use the strncpy as it doesn't nul terminate. And I can't use strlcpy as its not portable. Just a few questions. How can I put my function through its paces to ensure that it is completely safe and stable. Unit testing? Is this good enough for production? s...
Given a void *eip and an array of struct function symbols that contain the address, symbolic name, and binding of all function symbols in the file, how do I determine the function running at the time of the error? ...
I've been doing a few of the challenges on the Sphere Online Judge, but I can't seem to get the second problem (the prime generator) to run within the time limit. Does anyone have any tips for increasing the speed of the following code? #include <stdio.h> #include <math.h> int is_prime(int n); void make_sieve(); void fast_prime(int n);...
As per subject. I have some constants hash defined like so: #define CONST 40 I've set a break point in my program. How do I print the value of that constant? (I know I can just look at the source code, but I want to be sure of it) ...