C Programming - Pointers - Discussion

First of all malloc is memory data type and p is character pointer data type. So as we know comparison is possible between two same entity so we will cast malloc as character pointer then equate at character pointer p.

The difference between c and c++ pointer is only one thing
c pointer is suspicious pointer nothing but a pointer variable which holds address un related type...
simple example
int x=10;
float *p;
p=&x;// it leads to logical error but c complier doesnt give any error same program if you save.cpp extension error will occur.

Hello Mr/Ms

I need clear details about pointers and pointers memory allocation, can you send me this me the details.

Thanks kavya

Please explain why we use a pointer.

With real time example.

Plz?

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.

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

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

Thanks Kavyasri

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.