How to get the sizeof char pointer Post: 302322322

10 More Discussions You Might Find Interesting

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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std::exception

std::exception(3)					     Library Functions Manual						 std::exception(3)

NAME

       std::exception -

SYNOPSIS

       Inherited by __gnu_cxx::__concurrence_broadcast_error, __gnu_cxx::__concurrence_lock_error, __gnu_cxx::__concurrence_unlock_error,
       __gnu_cxx::__concurrence_wait_error, __gnu_cxx::forced_error, __gnu_cxx::recursive_init_error, std::bad_alloc, std::bad_cast,
       std::bad_exception, std::bad_function_call, std::bad_typeid, std::bad_weak_ptr, std::ios_base::failure, std::logic_error, and
       std::runtime_error.

   Public Member Functions
       virtual const char * what () const noexcept

Detailed Description
       Base class for all library exceptions.

       This is the base class for all exceptions thrown by the standard library, and by certain language expressions. You are free to derive your
       own exception classes, or use a different hierarchy, or to throw non-class data (e.g., fundamental types).

       Definition at line 60 of file exception.

Member Function Documentation
   virtual const char* std::exception::what () const [virtual],  [noexcept]
       Returns a C-style character string describing the general cause of the current error.

       Reimplemented in std::bad_function_call, std::ios_base::failure, std::bad_typeid, std::bad_cast, std::runtime_error, std::future_error,
       std::bad_exception, std::logic_error, std::bad_weak_ptr, and std::bad_alloc.

Author
       Generated automatically by Doxygen for libstdc++ from the source code.

libstdc++							  Tue Jun 10 2014						 std::exception(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