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Could somebody tell me the difference between:
int *p;
p=(int*)malloc(10*sizeof(int));
free(p);
or
int *p;
p=(int*)malloc(10*sizeof(int));
p=NULL;
freewill deallocate the memory thatppoints to – simply assigning it toNULLwill not (and thus you will have a memory leak).It is worth mentioning that it is good practice to assign your pointer to
NULLAFTER the call tofree, as this will prevent you from accidentally trying to access the freed memory (which is still possible, but absolutely should not be done).