I am writing my own code for malloc, calloc, and realloc.
When using call I call:
int *ptr = calloc(100, 4);
But when I try to print the addresses using:
for(i=0; i < 100; i++)
fprintf(stderr,"0x%x\n", ptr[i]);
Gives me all:
0x0
But using:
for(i=0; i < 100; i++)
fprintf(stderr,"0x%x\n", (ptr+i));
I get all sequential addresses.
Thoughts or ideas? I'm sure my malloc code works.
ptr[i] is not equivalent to (ptr+i). It's equivalent to *(p+i). Try doing *(p+i) in your second for loop there and you'll get a bunch of 0's like in your first test. If you want print the sequential addresses like you get with (p+i) try printing &p[i].
Note: By sequential I'm assuming you actually mean they're sizeof(int) bytes apart. Unless you change ptr from being int *.
If you understand what you're doing, you're not learning anything.
I actually have no idea what I was thinking when I posted that. Thanks for pointing out my mistake. It works now!
You can also use
instead.Code:fprintf(stderr,"%#x\n",
