malloc

[dasarisrikar]

Hi,
I hav one doubt....could u pls explainme...
I hav defined the following code in c

int **p;
int *q;
p=(int *)malloc(sizeof(int *));
*p=(int *)malloc(sizeof(int));
**p=12;
q=*p;
....
what s da sizeof p,*p,**p in bytes..........

Thanks & Regards.

[vimase]

Hi,
I hav one doubt....could u pls explainme...
I hav defined the following code in c

int **p;
int *q;
p=(int *)malloc(sizeof(int *));
*p=(int *)malloc(sizeof(int));
**p=12;
q=*p;
....
what s da sizeof p,*p,**p in bytes..........

Thanks & Regards.

First of all you need to allocate memory to p as,
p = (int **) ....., and not as
p = (int *).....
as p is double pointer.

Regarding the size,
size of p is 4 bytes,
size of *p is also 4 bytes, as both are pointers,
But size of **p is the size of the integer that your hardware supports.