Saturday, July 20, 2013

arrayName^ptrVar - spreadsheet 2013

See other posts why an array name is a permanent name plate on a permanently allocated room in memory. Once you understand that, you know
- can't move this name plate to another room
- can't put a 2nd name plate on the same room
- can't put this array name on the LHS of assignment

I feel overall, in most everyday contexts you can treat the array name in this example as if it's a variable whose type is int*. However, the differences lurk in the dark like snakes, and once bitten, you realize there are many many differences. The 2 constructs are fundamentally different.

Q: how to edit the below html table structure (content is easy)?
A: edit the html
A: copy paste to ms-word


  ptr to heap array ptr-var array-name (array not on heap)
declaration array-new int* p//allocate 32bit int arr[3]//allocate 3 ints




declared as a struct/class field
same as ptr-var

4-bytes onsite

entire array embedded onsite
declared as func param var no such thing common converted a ptr-var by compiler
initialize probably not supported char* p="abc";// puts the literal string in RO memory char arr[]="xyz"; //copying the literal string from RO memory to stack/heap where the array is allocated. The new copy is editable.
object passed as func arg same as ptr-var common converted to &arr[0]
dereference same as ptr-var common gives the first int element value. P119[[primer]]
address of same as ptr-var double ptr &arr == arr. See headfirstC post and also
http://publications.gbdirect.co.uk
/c_book/chapter5
/arrays_and_address_of.html
rebind/reseat same as ptr-var common syntax error
add alias to the pointee same as ptr-var common unsupported
as LHS (not as func param) same as ptr-var common. Reseat syntax error

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http://www.linkedin.com/in/tanbin