How to get the sizeof char pointer Post: 302322516

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1. Programming

sizeof

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

2. Programming

Regarding char Pointer

Hi, char *s="yamaha"; cout<<s<<endl; int *p; int i=10; p=&i; cout<<p<<endl; 1) For the 1st "cout" we will get "yamaha" as output. That is we are getting "content of the address" for cout<<s. 2) But for integer "cout<<p" we are getting the "address only". Please clarify how we are...

3. Programming

Adding a single char to a char pointer.

Hello, I'm trying to write a method which will return the extension of a file given the file's name, e.g. test.txt should return txt. I'm using C so am limited to char pointers and arrays. Here is the code as I have it: char* getext(char *file) { char *extension; int i, j;...

4. Programming

pass a pointer-to-pointer, or return a pointer?

If one wants to get a start address of a array or a string or a block of memory via a function, there are at least two methods to achieve it: (1) one is to pass a pointer-to-pointer parameter, like: int my_malloc(int size, char **pmem) { *pmem=(char *)malloc(size); if(*pmem==NULL)...

5. Programming

sizeof an array of structure without using 'sizeof' operator

Hi All, is it possible to find out the size of an array of structures ( without using 'sizeof' operator). The condition is we have the array of structure instant but we are not aware of the elements inside the structure. Can someone help me out? Thanks in advance.

6. Programming

Doubts regarding sizeof() operator

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? ...

7. Programming

sizeof(object) in C++

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() { }

8. Programming

help with char pointer array in C

i have an array like #define NUM 8 .... new_socket_fd = accept(socket_fd, (struct sockaddr *) &cli_addr, &client_length); char *items = {"one", "two", "three", "four", "five", "six", "seven", "eight"}; char *item_name_length = {"3", "3", "5", "4", "4", "3", "5", "5"}; ...

9. Programming

Compiler/Runtime uses of sizeof

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. Programming

Segmentation fault when I pass a char pointer to a function in C.

I am passing a char* to the function "reverse" and when I execute it with gdb I get: Program received signal SIGSEGV, Segmentation fault. 0x000000000040083b in reverse (s=0x400b2b "hello") at pointersExample.c:72 72 *q = *p; Attached is the source code. I do not understand why...

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ost_dir

ost::Dir(3)						     Library Functions Manual						       ost::Dir(3)

NAME

       ost::Dir -

       A low level portable directory class.

SYNOPSIS

       #include <file.h>

       Inherits ost::File.

   Public Member Functions
       Dir (const char *name=NULL)
       void open (const char *name)
       void close (void)
       virtual ~Dir ()
       const char * getName (void)
       const char * operator++ ()
       const char * operator++ (int)
       const char * operator* ()
       bool rewind (void)
       bool operator! ()
       bool isValid (void)

   Static Public Member Functions
       static bool create (const char *path, Attr attr=attrGroup)
       static bool remove (const char *path)
       static bool setPrefix (const char *path)
       static bool getPrefix (char *path, size_t size=256)

   Additional Inherited Members
Detailed Description
       A low level portable directory class.

       Used to support ccstd Directory container. This provides a basic mechanism for allocating and accessing file entries.

       Author:
	   David Sugar dyfet@ostel.com low level directory access class.

Constructor &; Destructor Documentation
   ost::Dir::Dir (const char *name = NULL)
   virtual ost::Dir::~Dir () [virtual]
Member Function Documentation
   void ost::Dir::close (void)
   static bool ost::Dir::create (const char *path, Attrattr = attrGroup) [static]
   const char* ost::Dir::getName (void)
   static bool ost::Dir::getPrefix (char *path, size_tsize = 256) [static]
   bool ost::Dir::isValid (void)
   void ost::Dir::open (const char *name)
   bool ost::Dir::operator! () [inline]
   const char* ost::Dir::operator* ()
   const char* ost::Dir::operator++ () [inline]
   const char* ost::Dir::operator++ (int) [inline]
   static bool ost::Dir::remove (const char *path) [static]
   bool ost::Dir::rewind (void)
   static bool ost::Dir::setPrefix (const char *path) [static]
Author
       Generated automatically by Doxygen for GNU CommonC++ from the source code.

GNU CommonC++							  Sat Jun 23 2012						       ost::Dir(3)

10 More Discussions You Might Find Interesting

1. Programming

sizeof

Discussion started by: ramneek

2. Programming

Regarding char Pointer

Discussion started by: sweta

3. Programming

Adding a single char to a char pointer.

Discussion started by: pallak7

4. Programming

pass a pointer-to-pointer, or return a pointer?

Discussion started by: aaronwong