int *a;
The statement written above means that a is a special variable(i.e. pointer) that will store an address of another variable which is integer.
For eg.
int *a;
int b=10;
a=&b;
then it will be like this-
Here 3465 is address for variable a and 1217 is address for variable b.
NOTE:All variables store integers bcoz address are always integers....
thus if we write
char *a;
It will not mean that a will store character it means that it will store the address of some variable whose datatype is char.
OK so far, but I think someone that this helped would need a lot more - for example the dreaded pointer arithmetic - dreaded because it causes so many bugs.
ReplyDeleteEg why say
int * p;
compared with
char * p1;
whne they are both just pointers? Because
*(p+1) is the next int, and
*(p1+1) is the next char ie the declared type controls how pointer arithmetic works. A beginner woul dneed a lot more explanation