Function Call; Control Transfer in the C Programming Language Video Tutorials

this is an L with a video tutorial for
the learning light on C programming so
in this video tutorial we can see some
more information on functions so first
we are going to see how we can call a
function from another function and then
we're going to see how the control will
be transferred from one function to
another function and how it will be
returned so here for the demonstration
purpose we're going to use two other
functions so first I'm going to
prototype it is going to be void
function 1 and it's not going to take
any parameter then another one is void
function 2 and it also not going to take
any parameters so here in this main
function we can now use a printf
statement
and we're going to say in main function
then we're going to use another printer
fragment that's why I'm a copy this and
paste it here and we're going to say
calling function one I Daniel into both
the printer functions so then we're
going to call the function one
then again we're going to say in main
function
after returning from function one
and then we're going to say finishing
main function
so now we need to define this function 1
so it's going to be void function 1 and
it's not going to take any parameter so
we're going to use another printf
statement here and we're going to say in
function 1 and then we're going to say
returning from function 1 so from this
function 1 we're going to call the
function
- that's why it can be function 2 and
before calling function 2 we can open a
message like okay I'm calling the
function - that's why I'm going to use
up interpreting here and I'm going to
say calling function - and then after
calling the function - you're going to
say in function 1 after returning from
function 2
so
this is it and the last thing we need to
do for this tutorial is we need to
define the function - it's going to be
void function -
here just going to use up in depth
Edmond and we're going to say in
function to then we're going to use the
last point of statement in this program
and we're going to say returning from
function to
so this is it so what we have done here
is we just call the function one from
this main function then from that
function one we call the function 2 and
now we're going to run this program and
we can see how this control was
transferred from this main function to
function 1 then this function 1 to
function 2 so I'm going to save it
compile and run so it says in main
function that's because when the program
starts execution begins from the main
function that's what it is going to say
in main function then we call the
function 1 that's why we are calling the
function 1 then the control will be
transferred to this function 1 to here
so it's going to print in function 1
then it says I'm calling the function to
from this function one that's why it
says calling function two then the
control will be transferred to this
function - from here in this function -
it just prints in function - and at last
it just returns from this function - so
it says in function - and return from
this function - so when this function -
returns it's going to return to the
caller of this function - does the
function 1 and then the remaining
statements of dysfunction 1 will be
executed it's going to print in function
1 after returning from function 2 so as
you can see how in function 1 after
returning from function 2 then it says I
am returning from this function 1 so
returning from function 1 and this
function 1 returns to its caller so here
there is the main function which call
this function 1 that's why this function
1 is going to return to this main
function so here you know when this
control returns to this main function is
going to execute the other statement of
this main function so it's going to
print in main function after returning
from function 1 that is this printf
statement and then it prints finishing
the main function so after that you know
this get CH is just for adding up house
and then it just terminates our main
function so
this is it this is how we can call a
function from another function and this
is how the control will be transferred
from one function to another function so
the notable thing here is when we call
this function 1 this function 1 is
called the called function and this main
function is called the caller function
so a caller function is a one which
calls another function so a called
function is one which is called by
another function so here this function
one is called function that's because
it's been called by this main function
so if you talk about this function 1 and
function 2 then this function 2 is
called function because it is called
from this function 1 and this function 1
is a caller function so this is it this
is about some information above the
functions so thanks for watching and
don't forget to subscribe I see you in
the next tutorial