From man realloc:The realloc() function returns a pointer to the newly allocated memory, which is suitably aligned for any kind of variable and may be different from ptr, or NULL if the request

Dec 7, 2012 · Both code are very problematic, if you use the same pointer to send and receive from realloc, if it fails, you will lose your pointer to free it later. you should do some thing like this :

char *newline = realloc ( oldline , newsize ); // Assuming oldline is the pointer to which the starting address // of the memory which malloc() has returned, is assigned and, // say, newsize is …

Jan 14, 2020 · How does realloc() reallocate the memory which was first allocated by malloc()? I know that you need to use malloc() before you´re able to reallocate the memory, but I don´t …

Feb 18, 2017 · If you give realloc an uninitialized pointer, it would think it was a valid pointer (a pointer is a pointer, all realloc can do is trust you). This implementation would then try to …

Aug 14, 2010 · If you want to do resizeable buffers the C way, use malloc / free / realloc, which are available in C++. If you want to do resizeable buffers the C++ way, use a vector (or deque, …

11 C requires that the pointer passed to realloc must be a pointer obtained from malloc, calloc or realloc function call (or a null pointer).

Aug 16, 2011 · Simple question about the realloc function in C: If I use realloc to shrink the memory block that a pointer is pointing to, does the "extra" memory get freed? Or does it need …

Dec 16, 2010 · From Open Groups' specifications: If ptr is a null pointer, realloc () shall be equivalent to malloc () for the specified size. If ptr does not match a pointer returned earlier by …

Why would one use realloc() function to resize an dynamically allocated array rather than using free() function before calling the malloc() function again (i.e. pros and cons, advantages vs.