Dear all,

Hello Guys!! This is my first post in the forum . I am really looking forward to having good fun in this site. My question is :

int mem_size = 10; 
char *start_ptr;
if((start_ptr= malloc(mem_size*1024*1024*sizeof(char)))==NULL) {return -1;}

I have allocated a chunk of memory of type char and size is say 10 MB (i.e mem_size = 10 ); Now I want to store the size information in the header of the memory chunk, To make myself more clear

Lets Say : start_ptr = 0xaf868004 (This is the value I got from my execution, it changes every time)

Now I want to put the size information in the start of this pointer.. i.e *start_ptr = mem_size*1024*1024;

But I am not able to put this information in the start_ptr. I think the reason is because my ptr is of type char which only takes one byte but I am trying to store int which takes 4 bytes, is the problem .

I am not sure how to fix this problem..

I would greatly appreciate your suggestions.

Cheers!!

Aditya