C Language Tutorial for Beginners on Nested Structure Session 18 Video Lecture | Basics of C Language - Fundamentals of Programming - Software Development

this session is a continuation of the
previous one that was such structures
now we will be seeing up using
structures in different ways a nested
structure structure within a structure
is called as nested structure when we
place a structure in another structure
we call it as nested structure now
syntax a structure we need play some
other and another structure out of it so
new type of program in this way we'll be
placing a structure in another structure
as you can see the address which is off
structure is available in another
structure EMP this is called as nested
structure let's take up a small a
program rather not a small one but this
time a pretty weird one struct address
in which I place characters city ten
character district and state five and in
de jure pin code another structure EMP
in which I place character name of ten
into agent salary or type integer
structure address a this structure is
the entire representation of this one
which is placed in there now when in
mean when I say structure EMP to this is
the array of this structure instance an
array has been created so int is ten
beginning I mean I takes zero and is
less than or equal to 1 enter % e
employees name age and all those things
like where is the values what all I say
will be displayed and that particular
blocks enter city and district all those
things will be displayed here finally
this fur block will print all the things
on the screen so if I execute the
program that will be in this way 0
'clock employee name age and salary let
it be Kiran and twenty five and ten
thousand city hyderabad district Ranga
Reddy are all district and state is AP
Andhra Pradesh and pin code five triple
063 another employee this time we let it
become our whose ages again let it be
twenty six and eleven thousand and our
our district or our district and this
again be a p5 triple zero 62 and the
other is
now you can see the entire information
Kieran whose age is 25 10,000 as salary
Hyderabad City District and AP pin code
the other employee Akuma 26 and 11,000
and all those things will be displayed
on the screen so by using structures we
can go for displaying all these things
are accepting information from the user
so this is how structure nested
structures programming is done after
that passing structure to a function
will go for an example first of all
comparing it to normal variables void
main before that I will go for the
prototype void function which takes an
integer this is the prototype when did
main nice a integer ie its holtz
consider three or let me scan it scanf
person d comma ampersand I and I'll pass
it to the function so in the function
void function which receives JS now when
I say printf person d comma J the value
what I say five is displayed in the
function to prove that I can say
function and value what I enter in
function five similarly if I create a
structure with name demo in which I
place an integer variable a and a float
variable F
and similarly this time function which
does not receive integer it receives
demo and not I this time it is demo I
demo variable di so d is dot i comma am
present di dot F ampersand d % f so pass
both passed da and demo variable DJ
receives it now when I say % e + % f DJ
dot i comma DJ dot F now one and two
point two so displacement function 1 and
2 point 0 similarly this is very much
close to the normal function we use
still no passing structure to a function
is one I set now typedef data type
typedef data type new data type bibref
so it is kind of a hash include stdio.h
and give then typedef int int EG integer
now when I say in Maine instead of
saying integer i can say integer I which
takes 10 and if I say printf person d
gamma I it will be printing what turn
holds that is what I holds that is 10
for this sake we use typedef it is
presentation or a substitution for the
variables types unions it is also a
derived data type like structure unions
are to group a number of different data
types of variables the keyword or unions
is Union Union is quite similar to the
structure as we said as you said Union
demo integer I FLOTUS so similarly demo
dee dee da Tay d dot F so this is how we
can create unions which are very similar
to structures example Union EMP in de
jure and no character name and float
salary difference between structures and
unions union will occupy the memory
space for the highest bytes of data
variable for the above example the
system will result and bytes of memory
while the case of structure the system
receives 16 bytes of memory by using
unions we can optimize a memory as well
so these are the differences and
something about structures and unions
which we have seen