10 More Discussions You Might Find Interesting
1. Programming
Hello, I read from a book exercise for a challenge. How to print out each letter of char array a by two different pointers pa and ppa in the example?
I have tried my code for letter "r" by testing without full understanding as only the first one worked.
#include<stdio.h>
int main()
{
char... (17 Replies)
Discussion started by: yifangt
17 Replies
2. Programming
Hello.
I am new to this forum and I would like to ask for advice about low level POSIX programming.
I have to implement a POSIX compliant C shared library.
A file will have some variables and the shared library will have some functions which need those variables.
There is one special... (5 Replies)
Discussion started by: iamjag
5 Replies
3. Programming
Hi guys, I'm trying to understand pointers in C and made a simple example and I've problems with It.
Can someone help?
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
int f1(char **str_);
int main(int argc, char **argv)
{
char *str = NULL;
f1(&str);
... (3 Replies)
Discussion started by: pharaoh
3 Replies
4. Programming
I have a special character called ô. When it is declared as a character variable its showing it can be printed. But when it is declared as a character pointer variable its showing it cannot be printed. I am just wondering why its happening like this..
c1 = '@';
c2 = 'ô';
char *fp;
fp="XXô";
if... (1 Reply)
Discussion started by: sivakumar.rj
1 Replies
5. Programming
I am writing a shared library in Linux (but compatible with other UNIXes) and I want to allow multiple instances to share a piece of memory -- 1 byte is enough. What's the "best" way to do this? I want to optimize for speed and portability.
Obviously, I'll have to worry about mutual exclusion. (0 Replies)
Discussion started by: otheus
0 Replies
6. Programming
Hi all. I am trying to use restricted pointers to allow the gcc compiler optimize the code, but I have not been able to make it work so far. I am testing with this code:
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <sys/time.h>
void vecmult(int n, int * restrict a, int... (0 Replies)
Discussion started by: carl.alv
0 Replies
7. Programming
Hi I mash with pointers in C. I solve this problem about 5 hours and I don't know how I should continue.
void InsertFirst (tList *L, int val) {
tElemPtr new;
if((new = malloc(sizeof(tElemPtr))) == NULL) Error();
new->data = val;
new->ptr = L->frst;
L->frst = new;... (2 Replies)
Discussion started by: Milla
2 Replies
8. Programming
I need to create a shared library to access an in memory DB. The DB is not huge, but big enough to make it cumbersome to carry around in every single process using the shared library. Luckily, it is pretty static information, so I don't need to worry much about synchronizing the data between... (12 Replies)
Discussion started by: DreamWarrior
12 Replies
9. Programming
is this a valid c declaration
int (*ptr(int *b));
plz explain... (4 Replies)
Discussion started by: areef4u
4 Replies
10. Programming
hi all,
let say i have a pointer exit, and this exit will store some value. how can i store the value that the pointer points to into an array and then print them out from the array.
thanks in advance (2 Replies)
Discussion started by: dianazheng
2 Replies