Although this is question is more a C question than a an algorithm
question, it is in fact a very good question. The calloc function
works very like malloc, but it initializes all its bits to zero. It
has a little more overhead than malloc, because it must write zeros in
the memory, but it could be useful.
The syntax are a little bit different:
void * calloc ( size_t num, size_t size );
void * malloc ( size_t size );

But take a look in another very useful function: realloc
http://www.cplusplus.com/reference/clibrary/cstdlib/realloc/

And do not forget to free the memory!

Good luck,
Tiago

On Jul 11, 5:15 am, RIDER <mohit...@gmail.com> wrote:
> what is the advantage of using calloc() over malloc() and in which
> case i should use that?

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