System Workbench for STM32

&testar is of **int type. Try this:

int testar[] = {1,2,3};
int * ptestar;
ptestar = testar+1;

P.S.

You can expect quick answers with this type of questions (C language question unrelated to the IDE or STM32) in other general C programming forums.

ptestar = testar+1;

is not equivalent to

ptestar = &testar+1;

The former is the same as

ptestar = &testar[1];

This is not what I am seeking to do, which is to get a pointer to a location just beyond the bounds of the array to find the array size by the method I describe in this thread:
http://www.openstm32.org/tiki-view_forum_thread.php?forumId=7&comments_parentId=1612

I have given up on that method. I realize now there is no advantage to doing it that way over the use of the sizeof operator.

Posted by dautrevaux on 2015-12-16 19:08

Hi,

int **ptestar = &testar+1;

1. If you follow strictly the C standard, your C program is not standard compliant, as pointer arithmetic is restricted to stay inside a single C object, while you code use pointer arithmetic to point to a integer array located after the testar object
2. If you want to be clearer that what follows testar is not another integer array, you may devlare ptestar as a pointer to void:
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   void *ptestar = &testar+1;

3. Obviously, the testar declaration must be an array definition that provides the compiler with the size of the array; it cannot be an external declaration of a variable size array as, in this case, the compiler will not have any way, at compile time, to know the size of the array: it will only be known at link time, too late for the compiler to use it.

Hope this helps,

Bernard (Ac6)