I want to do something that seems fairly simple. I get results but the problem is, I have no way to know if the results are correct.
I'm working in C and I have two pointers; I want to print the contents of the pointer. I don't want to dereference the pointer to get the value pointed at, I just want the address that the pointer has stored.
I wrote the following code and what I need to know is if it is right and if not, how can I correct it.
/* item one is a parameter and it comes in as: const void* item1 */
const Emp* emp1 = (const Emp*) item1;
printf("\n comp1-> emp1 = %p; item1 = %p \n", emp1, item1 );
While I'm posting this (and the reason it is important that it is correct) is that I eventually need to do this for a pointer-to-a-pointer. That is:
const Emp** emp1 = (const Emp**) item1;
To print address in pointer to pointer:
printf("%p",emp1)
to dereference once and print the second address:
printf("%p",*emp1)
You can always verify with debugger, if you are on linux use ddd
and display memory, or just plain gdb
, you will see the memory address so you can compare with the values in your pointers.