Answer Posted / abi

Yes there are differences between a null pointer and a void
pointer. As you know that a pointer holds the memory address
of any variable . So we can say for a null pointer that :

- A null pointer can be of any primitive type(e.g - int *
,char * etc)

-However a null pointer does not point to any memory
location , i.e. it does not contain a reference of any
variable/value. Hence we may state that it has a NULL as its
value making it a null pointer.

Where as in case of a void pointer we can say :

- void pointer is always of type void *

- Mainly such pointers are used for dynamic memory
allocations (using malloc(), calloc() and realloc()
functions) , where memory block reserved is pointer to by a
void pointer and as the pointer value is returned it has to
be explicitly type casted to a particular desired type.

for e.g

int * ptr;

ptr=(int *) malloc(sizeof(int));

[ Here malloc () returns a pointer of void * type(i.e a void
pointer) which is type casted to int * as per our requirement ]

Explain how does free() know explain how much memory to release?

1134

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1003

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1191

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1158

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1344

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1151

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1099

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what is the c source code for the below output? 10 10 10 10 10 10 10 10 10 10 9 9 7 6 6 6 6 6 6 9 7 5 9 7 3 2 2 5 9 7 3 1 5 9 7 3 5 9 7 4 4 4 4 5 9 7 8 8 8 8 8 8 8 8 9

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