I have a connection which is behind a restrictive firewall which only allows HTTP(S) access through a proxy (10.10.1.100:9401). The IP address I get is dynamic and the subnet mask is 255.255.255.255 (I know, weird!). I tried to write a simple Python socket program to connect to the proxy in order to send some HTTP requests: import sock...
Hello Folks, How do you (programatically) show the windows local users/groups dialog? In Vista it's usually under Control Panel - Administrative Tools - Computer Management - Local Users and Groups. Similar kind of dialog with the same functionalities (add/remove users/groups) is also acceptable, as long as supported by Windows Xp and a...
While there are lots of different sophisticated implementations of malloc / free for C/C++, I'm looking for a really simple and (especially) small one that works on a fixed-size buffer and supports realloc. Thread-safety etc. are not needed and my objects are small and do not vary much in size. Is there any implementation that you could ...
Hi Why does this not compile? Cant see the error #include <stdio.h> #include <string.h> #include <stdlib.h> int main(void) { char *c; FILE *f = fopen("file.txt", "r"); if(f == NULL) { printf("Could not open file"); } while((c = fgetc(f)) != EOF) { if(strcmp(c, " ") == 0) { printf(" ");...
In a C lab this uber simple code appears: #include <stdio.h> int suma (int a, int b) { return a+b; } int mult (int a, int b) { return a*b; } int main(void) { int a,b; printf ("Operando 1: "); scanf("%d",&a); printf("Operando 2: "); scanf("%d",&b); printf("%d+%d=%d\n",a,b...
hi - I am going through a book and I tried running this example but I receive a segmentation fault - gdb says it's when it sets argv[0] = filename; this code is copied/pasted straight from book's downloadable code samples. #include <unistd.h> int main() { char filename[] = "/bin/sh\x00"; char **argv, **envp; // arrays that contain...
I have the following C-code: #include<stdio.h> #include<stdlib.h> typedef struct node { int a; }node; int main() { node * n; printf("\n%d\n",n->a); n = (node *) malloc ( sizeof( node )); printf("\n%d\n",n->a); n->a = 6; printf("\n%d\n",n->a); free(n); printf("\n%d\n",n->a); n->a = 4; pri...
Hi I am trying to make a very easy converter/compressor; the program should take a file with 4 different types of ASCII characters and writ it out as binary to a file. The program should also read the binary file and convert it to ASCII and print it out on the screen. Under is my code, I can’t really get the char/cstring. What types of ...
Possible Duplicate: Where can I find C coding exercises to practice? I am learning c programming language and i need some exercises resources to practice from. ...
Hi, Is there a way in C to know the following information about signals: Is certain signal is blocked now? Are we inside a signal handling function chanin (i.e, was the current code called from function which was called as signal handler for certain signal)? If so, can I know what is the current signal? Thanks ...
I am using Visual Studio 2010 Pro for simple C programming, I would like to know how I can provide input to the program without having to manually do so. The enviroment I am used to working is your standard commandline Unix enviroment. Once I compile a C file call "inputsInts" it becomes "a.out" and to test input I would type: The easy ...
Hi all, Any recommendations out there for Windows application tuning resources (books web sites etc.)? I have a C++ console application that needs to feed a hardware device with a considerable amount of data at a fairly high rate. (buffer is 32K in size and gets consumed at ~800k bytes per second) It will stream data without under run...
Hi, I have accelerometer values for the 3 axis(usually when there is only gravity contains data between -1.0 and 1.0 ): float Rx; float Ry; float Rz; I make soma calculations, then I get the angles for each axis. float R = sqrt(pow(Rx,2)+pow(Ry,2)+pow(Rz,2)); float Arx = acos(Rx/R)*180/M_PI; float Ary = acos(Ry/R)*180/M...
In the following code, I am trying to get a folder location from the user. However, when I selected E:\ in the folder browser, szAbsolutePath doesn't give me the path for the CD burner temporary folder. This prevents me from saving to this location. However, if I choose something like E:\folder1\, I get the full path and can write out fi...
Suppose I have two int arrays x and y, and both of them have length 3. x={0,1,2}. Is there any one step way to assign the values of x to y. When I do y=x, and try to print the values of y, the code does not compile. I dont want to go through the pain of writing a for loop, and write y[i]=x[i] ...
The following code doesn't work as intended but hopefully illustrates my attempt: long foo (int a, int b) { return a + b; } void call_foo_from_stack (void) { /* reserve space on the stack to store foo's code */ char code[sizeof(*foo)]; /* have a pointer to the beginning of the code */ long (*fooptr)(int, int) = (long (*)(int...
I am interested in delving into Erlang's C source code and try to understand (at least at a moderate level) what is going on under the hood. Where can I find info on the design and structure of the code? ...
I'm a tad confused between what is and is not a Constant Expression in C, even after much Googleing. Could you provide an example of something which is, and which is not, a Constant Expression in C? ...
I am working on an application which does sequentially write a large file (and does not read at all), and I would like to use posix_fadvise() to optimize the filesystem behavior. The function description in the manpage suggests that the most appropriate strategy would be POSIX_FADV_SEQUENTIAL. However, the Linux implementation descripti...
I'm currently brushing up on C programming and I'm looking for an online site that teaches the language through a series of programming problems. These problems would gradually increase in complexity and focus on introducing one or two new concepts of the language as the user/student learns more. I'm familiar with the UVa Online Jud...