Memory allocation: Difference between revisions

=={{header|Pascal}}==

=== Stack ===

Variables declared in procedures and functions are allocated on the stack.<br>

Their scope is local to the respective procedure/function and their memory is freed with the end of the procedure/function.

=== Heap ===

Dynamicly created objects (dynamic arrays, class instantiations, ...) are allocated on the heap.<br>

Their creation and destruction is done explicitly.

<lang pascal>type

TByteArray = array of byte;

var

A: TByteArray;

begin

setLength(A,1000);

...

setLength(A,0);

end;</lang>

<lang pascal>type

Tcl = class

dummy: longint;

end;

var

c1: cl;

begin

c1:=Tcl.create;

...

c1.destroy;

end;</lang>