If I have an integer like this in several places in my code... int my_secret = 42; ... is it possible to make it more difficult to find that integer in the compiled program? I've seen this done with strings, for example by shifting each letter by x characters and then un-shifting them at runtime, but I doubt this technique would work ...
I want to examine and modify some open source programs written in C. Is it sensible to use Eclipse for this purpose? If so, what plugins should I add? What "gotchas" should I be aware of? If not, what FOSS C IDEs do you recommend for coding C on a linux box? Emacs, while undeniably powerful, is not to my taste (I'm more a mouser than a...
I am using glib in my application, and I see there are convenience wrappers in glib for C's remove, unlink and rmdir. But these only work on a single file or directory at a time. As far as I can see, neither the C standard nor glib include any sort of recursive directory walk functionality. Nor do I see any specific way to delete an ent...
Hi, I'm a new to C and got stuck with subj. I can split string with strtok but I don't know how to get a random token. Thanks. ...
I'm writing a program which reads text from a file, and determines the number of sentences, words, and syllables of that file. The trick is, it must only read one character a time, and work with that. Which means it can't just store the whole file in an array. So, with that in mind, heres how my program works: while(character != EOF) {...
Char is 1 byte unsigned short is 2 bytes So if I cast a char * to unsigned short *, will it change the length of the buffer? For example I am passing char * and length to a VUMeter function. The function casts the char * to unsigned short *: short* pln = (short*) buffer;` Now I loop through the buffer, so can I use same length which...
Hi All, I'm aware of a number of BigInt libraries for C on various platforms and how to use them but I'm intrigued: how do they work? How would I go about building my own library (I'm not going to try, no point re-inventing the wheel but I'm interested in how it might happen)? Can anyone point me towards tutorials etc that might explain...
When I compile a program using just gcc code.c There are no messages, and an output file is generated successfully. The outputted file works. However, when I try to the same cygwin installation's gcc compiler in an IDE (I've tried Netbeans and Dev-C++), I get the following errors main.cpp:27: error: `exit' undeclared (first use this ...
In C its optional. In C++ one "MUST" declare a function before its used/defined. Why is it so? Whats the need? We don't do that in C# or Java. Funny thing is while we are defining a function. The definition itself has a declaration even then, we need to declare. God knows why? ...
How to set the console window title in C? printf("%c]0;%s%c", '\033', "My Console Title", '\007'); This works only under linux, not in windows, Does anybody know a "cross-platform" solution? (of course not "system ( title=blah )") ...
I have a a char array: char* name = "hello"; I want to add an extension to that name to make it hello.txt How can I do this? name += ".txt" won't work ...
I was reading some source code files in C and C++ (mainly C)... I know the meaning of 'static' keyword is that static functions are functions that are only visible to other functions in the same file. In another context I read up it's nice to use static functions in cases where we don't want them to be used outside from the file they are...
Hi everybody! I want to know if it is possible to use OpenGl ES on Xilinx to developp a 3D application. thanks! ...
The problem is to extend the binary search algorithm to find all occurrences of a target value in a sorted array in the most efficient way. Concretely speaking, the input of the algorithm are (1) a sorted array of integers, where some numbers may appear more than once, and (2) a target integer to be searched. The output of the algorithm...
I am trying to write a function named roundD that rounds its first argument to an integer value according to the mode specified by its second argument. I will be writing the function in assembly language, using gcc’s inline assembler. I do not want to use any predefined functions.. I think i need to set the Rounding Control field of t...
I came from a C-Java-C# world... where the parentheses were VIP citizens and types were loved by everyone : ) Sometimes I need to develop some piece of code to automatize a repetitive task, convert some complex frame, order an input file, send programatic request to a server... you know what I mean? But sometimes I wonder how easier c...
I would like to allocate a structure on the heap, initialize it and return a pointer to it from a function. I'm wondering if there's a way for me to initialize const members of a struct in this scenario: #include <stdlib.h> typedef struct { const int x; const int y; } ImmutablePoint; ImmutablePoint * make_immutable_point(int x, in...
I am thinking about creating a database system for images where they are stored with compact signatures and then matched against a "query image" that could be a resized, cropped, brightened, rotated or a flipped version of the stored one. Note that I am not talking about image similarity algorithms but rather strictly about duplicate det...
Hi, I am not sure how to deal with floating point exceptions in either C or C++. From wiki, there are following types of floating point exceptions: IEEE 754 specifies five arithmetic errors that are to be recorded in "sticky bits" (by default; note that trapping and other alternatives are optional and, if provided, non-default). * ...
If I have a parent coordinator program and a worker program, but the coordinator program is creating all of the needed worker processes. If I want to implement the alarm() method correctly to kill all of the processes and terminate the program after a certain amount of time. Is this the correct way to implement it? The current way I hav...