C Programming - Pointers - Discussion

Hey tell me where actually memory get allocate when we use malloc(), or calloc().

What is main diff between malloc() and calloc() ?

1) All memories allocated by memory management API's like malloc and calloc will be allocated from the Heap partition of the program.

2) Both malloc and calloc will allocate memories but, malloc just allocate required memory leaving the garbage value as it is but calloc allocate memory required and clear it with 0.

Can you combine two statements in pointers.

Can you explain pointe def and array def.

Its very much simple many people have discussed in a lengthy way:

Understand 1st statement char*p, it means it stores the address of p let us its address is 1000. It means 1000---->p, clearly hear 1000 is pointing p, i.e char*p= p.

Replace p as char *p.

Thanks Kavyasri

Thanx kavyasree & mahesh........

I want difference for pointer in c and c++?

The work of malloc function----->

> Malloc function allocate a fixed size block of memory from the heap and retuns a void type of pointer to it.
> Now we wont to store char type value in that memory so we have to convert the void type pointer to char type that's why (char *) is used to typecast the void pointer to char type.

The diff. between malloc and calloc------->
> syntaxt : data-type *p=(data-type *)malloc(size_t size);
> Malloc function allocates the a fixe size block of memory from the heap.
>syntaxt : data-type *p=(data-type *)calloc(size_t nsize,size_t size);
>Calloc function allocates the a size of (nsize *size) variable size block of memory from the heap.

Please explain why we use a pointer.

With real time example.

Plz?