Reply to thread

Message: [QUOTE="Martin, post: 3148196"] I think my example was wrong. Of course memcpy() is being passed a pointer to a volatile char. This is more what I meant: char arr[10]; char arr2[10] volatile char *parr = arr; /* ... code that initialises both arrays ... */ if ( memcmp(&parr[3], &arr2[3], 1) ... ) /* etc. */ Which is analagous to Chris Torek's use of the volatile pointer to structure. I think that is OK because the first argument now is not pointing to a volatile once deferenced, but the parr itself it volatile so the call to memcmp() cannot be optimised away - *however* in the case above where one element of an array is being compared with another, I can see that my original example in tandem with the use of the != operator you suggest is a solution I can adopt. Thanks for your help. [/QUOTE]