Delve into the intricacies of memory structures with these comprehensive lecture notes from COMP15212. Covering essential topics like data representation, memory allocation, and pointers, this guide is perfect for mastering how memory is organized and manipulated in computer systems.
Clanguage Compilation
A high level
language with low level features.
Access to , and
management of memory prog .
( D
Proprocessing - prog .
( D
Compiling
A
This for
makes a
very powerful language *
*h prog . S
Where there there is
is
great power great responsibility *
prog &
Linking ① prog .
O
Assembling
A
Imperative :
Sequences of statements that are executed in turn
k
lib
Typed : Variables declared with a type
.
Control Structures : if for loops
, ,
while , etc
Memory Management : Direct manipulation of pointer structures
Data Structure
Pointers Arrays
Alias Address Data Source file : Collection of items
020A int var-a ; All items are the same size
0209 Items stored
Sequentially
in Far
are in
memory
var-a ↳ 0208 2001 b
-
;
0207 -o
Arrays and pointers are
essentially interchangeable in .
2
0206 var-a = 0x2001 ;
0205 --
0204 Vareb &var-a //varb points to Structures
=
; var-a
0203 Traditionally known
...
as records
Similar to the parts of
data an object in Java or Python
A struct has elements which are accessed via their names (rather than indices in
0105 an array
0104 Elements can be
different types (and sizes
var-b 0103 0208
0102
pack (1) tells the compiler to pack the data structure
0101
0100
OOFF
OOFE
Pointers live on the stack , but contain addresses of the heap
Arrays and structs live on the heap
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