So you have Table mapping the 26 ascii characters from the English alphabet to their corresponding morse code strings typedef struct a_look_tab { char table[asciiNum][MORSE_MAX+1]; } ALookTab; and asciiNum is the 0 for a, 1 for b, and so on. how to return an index (int) that is the index of the morse char. So what we are doing...
Following along from this question: how-do-i-check-if-gcc-is-performing-tail-recursion-optimization, I noticed that using gcc with -fPIC seems to destroy this optimization. I am creating a shared library, but I doesn't seem to need the -fPIC option. Well, my question is, why does -fPIC change gcc optimizations ? Do I need to keep -fPIC ...
I have developed one popup window (Non decorated) using GTK+ and glade tool in C. It popup on its parent window when a button clicked. I want to destroy or hide this popup window when user clicks out side this window. User can click on parent window or any other window. I have tried to capture GDK_FOCUS_CHANGE event but I am not able t...
I have the following code: int takeEven(int *nums, int numelements, int *newlist) { newlist = malloc(numelements * sizeof *newlist); int i, found = 0; for(i = 0; i < numelements; ++i, nums++) { if (!(*nums % 2)) { *(newlist++) = *nums; found++; } } newlist -= found; printf(...
I know more C++ than C. Does C use -> for pointers, or is that only used in C++? ...
Hi, I need to implement a character encoding conversion function in C++ or C( Most desired ) from a custom encoding scheme( to support multiple languages in single encoding ) to UTF-8. Our encoding is pretty random , it looks like this Because of the randomness of this mapping, I am thinking to use std::map for mapping our encoding t...
I've done this simple app in Gtk, just to test things out... I come from swing so redefining a draw event function is normal for me... Anyway seems not to work: #include <gtk-2.0/gtk/gtk.h> #include <gtk-2.0/gdk-pixbuf/gdk-pixbuf.h> #include <stdlib.h> #include<string.h> #include<stdio.h> #include <iostream> GdkPixbuf *imm; void destr...
I wanna display a image from the internet how can I put it？ ...
What is the best way to pass three dimensional arrays into functions in C? ...
struct DummyStruct{ unsigned long long std; int type; }; DummyStruct d; d.std = 100; d.type = 10; /// buggy printf, unsigned long long to int conversion is buggy. printf("%d,%d\n",d.std, d.type); // OUTPUT: 0,100 printf("%d,%d\n", d.type, d.std); // OUTPUT: 10,100 printf("%lld,%d\n",d.std, d.type); // OUTPUT: 100,10 ...
I have some old C 32 Bit DLLs that are using Oracle's Pro C precompiler library (proc.exe) to expose a hundred or so sproc/func calls to an even older VB6 GUI which references these functions through explicit Declare statements like so: Declare Function ConnectToDB Lib "C:\windows\system32\EXTRACT32.DLL" (CXN As CXNdets, ERR As ERRdets)...
I'm porting a Windows application to Linux and I have a synchronization problem. In Windows I'm using a system-level named mutex to sync access to a shared memory block. How do I emulate that in Linux? I've created a SystemV semaphore, using semget. The problem is that it is not reentrant, if I already hold it it will block, unlike on ...
I'm sure this question has been asked many times, but I can't figure this out. Bear with me. So when you download a library, you get a bunch of .c and .h files, plus a lot of other stuff. Now say you want to write a program using this library. I copy all the .h files into my project directory. It just doesn't compile. Great, so then I...
Where can I find a prime number generator in C? ...
Is it possible to tell the C preprocessor to check whether a function (not a macro) is declared? I tried the following, but it doesn't appear to work: #include <stdio.h> int main(void) { #if defined(printf) printf("You support printf!\n"); #else puts("Either you don't support printf, or this test doesn't work."); #endif ret...
hi, i have been going through some code and came across a statement that somehow disturbed me. typedef GLfloat vec2_t[2]; typedef GLfloat vec3_t[3]; From my perspective, a statement such as typedef unsigned long ulong; Means that ulong is taken to mean unsigned long Now, can the statement below mean that vec2_t[2] is equiv...
I was curious if anyone had any experience/knowledge about aim bots in online FPS games such as Counter-Strike. I am curious and would like to learn more about how the cursor knows how to lock on to an opposing player. Obviously if I wanted to cheat I could go download some cheats so this is more of a learning thing. What all is involved...
Hello, I am trying to develop a program in C that will "crack" the crypt(3) encryption used by UNIX. The most naive way to do it is brute forcing I guess. I thought I should create an array containing all the symbols a password can have and then get all possible permutations of them and store them in a two-dimensional array (where all th...
I have a little problem with a Pro*C query I'm trying to optimise. To explain, our application searches for rows in a huge database. These rows exist in several languages and the old code selected a row for each language in an array. Now as these queries are the most time consuming part of our app, I wanted to make only one query which ...
I try to log all the output of a program written in Python and C. However, printing from Python causes IOError: [Errno 9] Bad file descriptor Please, does anyone know what the problem is and how to fix it? PS: It's on Windows XP, Python 2.6 and MinGW GCC #include <windows.h> #include <fcntl.h> #include "Python.h" int main() { int...