03-30-2009
I was hoping it should produce a correct number, but that would happen in absence of processors not needing any padding at the end of structures
10 More Discussions You Might Find Interesting
1. Programming
we know that sizeof never returns zero when used with structure
then why in this case it is returning zero
struct foo
{
char c;
};
void main()
{
struct foo f;
cout<<sizeof(f);
}
i am working on solaris 5.8
isn't the above function should return the size of empty structure (7 Replies)
Discussion started by: ramneek
7 Replies
2. Programming
Hello Groups
I am trying to find out ways of comparing a value from a 'c' structure to a value in another 'C' structure. the 'C' structure can be a List or liked list as it contains lot many records.
if we loop it in both the structures it is going to consume time.
I am looking for a simple... (3 Replies)
Discussion started by: dhanamurthy
3 Replies
3. Programming
Hi,
I have a following problem in C.
I have a function A in which I used to call another function (function B) and pass an array of values through array variable by using below:-
foo=functionB(array);
In functionB, i used to just return some "values" (e.g return num;) in order to pass... (1 Reply)
Discussion started by: ahjiefreak
1 Replies
4. Programming
The below code throws the error, since the size of x = 19 is not passed to the cstrCopy function.
using namespace std;
static void cstrCopy(char *x, const char*y);
int main ()
{
char x;
const string y = "UNIX FORUM";
cstrCopy(x,y.c_str());
return 0;
}
void cstrCopy(char *x,... (3 Replies)
Discussion started by: SamRoj
3 Replies
5. Programming
Hi,
There are some bewildering sizeof() questions I have in my mind. Could anyone shed some light on this?
int main() {
printf("%d\n", sizeof(main)); // Ans: 1
}
That is, the sizeof() a function identifier though it is treated internally as a pointer gives 1 byte always, why?
... (5 Replies)
Discussion started by: royalibrahim
5 Replies
6. Programming
Hi,
I have defined the class and call the sizeof(object to class) to get the size.
# include <iostream>
# include <iomanip>
using namespace std;
class sample
{
private:
int i;
float j;
char k;
public:
sample()
{
} (2 Replies)
Discussion started by: ramkrix
2 Replies
7. Programming
if i create an array of pointers to a structure "struct node" as:
struct node *r;
and create "n" number of "linked lists" and assign it to the various struct pointers r using some function with a return type as structure pointer as:
r=multiplty(.......) /*some parameters*/
is... (2 Replies)
Discussion started by: mscoder
2 Replies
8. Programming
Which data structure will be most appropriate to represent a sparse array? (1 Reply)
Discussion started by: rupeshkp728
1 Replies
9. Shell Programming and Scripting
Hai
how to find size of a file??
ex : /home/kiran/pdk/sample/calibre this is a path
In that I have to find size of a files in side a calibre(it is the folder) like .results or .summary (1 Reply)
Discussion started by: kiran425
1 Replies
10. Programming
Ignoring other considerations for a moment and in general ...
Would there be a difference in result (dot oh or execution) of:
A.
strncpy( a, b, sizeof(a) );
vs.
B.
c = sizeof(a);
strncpy( a, b, c );
My general understanding is (at least I think my understanding is) that... (10 Replies)
Discussion started by: GSalisbury
10 Replies
array(3) Library Functions Manual array(3)
NAME
array - The array library interface
SYNTAX
#include <array.h>
DESCRIPTION
An allocated array variable keeps track of
o a (nonzero) pointer to a dynamically allocated region of memory;
o the number of bytes allocated (always positive); and
o the number of bytes initialized (between 0 and the number of bytes allocated).
There are two other possibilities for the state of an array variable: unallocated and failed. In both cases, there is no dynamically allo-
cated region of memory.
A new array variable is normally created as a static variable:
#include "array.h"
static array x;
At this point it is unallocated. The array library provides various allocation and inspection functions.
A new array variable can also be created dynamically. It must be initialized to all-0, meaning unallocated, before it is given to any of
the array functions. It must be returned to the unallocated (or failed) state, for example with array_reset, before it is destroyed. These
rules prevent all memory leaks.
Expansion and inspection
array x;
t* p1 = array_allocate(&x,sizeof(t),pos);
t* p2 = array_get(&x,sizeof(t),pos);
t* p3 = array_start(&x);
int64 len = array_length(&x,sizeof(t));
int64 bytes = array_bytes(&x);
Truncation and deallocation
array x;
array_truncate(&x,sizeof(t),len);
array_trunc(&x);
array_reset(&x);
array_fail(&x);
Comparison
array x;
array y;
if (array_equal(&x,&y))
/* arrays are equal... */
Concatenation
array x;
array y;
array_cat(&x,&y);
array_catb(&x,"fnord",5);
array_cats(&x,"fnord");
array_cats0(&x,"fnord"); /* also append the */
array_cat0(&x); /* append */
array_cate(&x,"fnord",1,4); /* append "nor" */
ORIGINAL API DEFINITION
http://cr.yp.to/lib/array.html
SEE ALSO
array_get(3), array_start(3), array_fail(3)
array(3)