< cpp‎ | memory‎ | c
Defined in header <cstdlib>
void* calloc( std::size_t num, std::size_t size );

Allocates memory for an array of num objects of size size and initializes it to all bits zero.

If allocation succeeds, returns a pointer to the lowest (first) byte in the allocated memory block that is suitably aligned for any object type.

If size is zero, the behavior is implementation defined (null pointer may be returned, or some non-null pointer may be returned that may not be used to access storage)


[edit] Parameters

num - number of objects
size - size of each object

[edit] Return value

Pointer to the beginning of newly allocated memory or NULL if error has occurred. The pointer must be deallocated with free().

[edit] Notes

Due to the alignment requirements, the number of allocated bytes is not necessarily equal to num*size.

Initialization to all bits zero does not guarantee that a floating-point or a pointer would be initialized to 0.0 and the null pointer value, respectively (although that is true on all common platforms)

[edit] Example

[edit] See also

C documentation for calloc