Pointer Operations in C

Creation

& variable  Returns variable’s memory address

Dereference

* pointer  Returns contents stored at address

Indirect assignment

* pointer = val  Stores value at address

Assignment

pointer = ptr  Stores pointer in another variable

eg. 

      if a variable  is a=24 and it is stored at memory address 2000.Consider we want to point a pointer named p at that variable,do following things.

int *p,a=24,b,c;//initializing the pointers

*p=&a;//stores 2000 address to the pointer's address

b=*p;//outputs as '24' as it returns content of pointer

*p=55;//directly stores the value at address 2000

c=p;//stores the pointer