Hello can you please include screenshots of this program, input code as well as the output. thank you!!!

Create, compile, and execute a C program to demonstrate the basic Pthreads API for constructing a multithreaded program that calculates the summation of a nonnegative integer in a separate thread. When this program begins, a single thread of control begins in main$().$ After some initialization, main$()$ creates a second thread that begins control in the runner$()$ function. Refer Fig $4\mathrm{.}11$ Multithreaded C program using the Pthreads API. You need to add #include to include the standard library to avoid implicit declaration of function $$atoi$$ warning.

Note: Verify if all underscores are present. All pthread functions begin with pthread

To compile a program called multithread.c:

gcc multithread.c $-$pthread $-$o multithread

The sample program calculates the summation of the integer parameter provided on the command line. To compute summation of numbers $1$ to $100,$ execute:

$./$multithread $100$

Add an additional pthread$\_$create line to create a new thread that calls an average$()$ function to calculate the average of the same numbers.

Figure $4\mathrm{.}11$

#include

#include

#include

int sum; $/*$ this data is shared by the thread$($s$)*/$

void $*$runner$($void $*$param$)$; $/*$ threads call this function $*/$

int main$($int argc, char $*$argv$[])$

$\{$

pthread t tid; $/*$ the thread identifier $*/$

pthread attr t attr; $/*$ set of thread attributes $*/$

$/*$ set the default attributes of the thread $*/$

pthread attr init$($&attr$)$;

$/*$ create the thread $*/$

pthread create$($&tid, &attr, runner, argv$[1])$;

$/*$ wait for the thread to exit $*/$

pthread join$($tid$,$NULL$)$;

printf$("$sum $=\%$d$$n$",$sum$)$;

$\}$

$/*$ The thread will execute in this function $*/$

void $*$runner$($void $*$param$)$

$\{$

int i$,$ upper $=$ atoi$($param$)$;

sum $=0$;

for $($i $=1$; i $<=$ upper; i$++)$

sum $+=$ i;

pthread exit$(0)$;

$\}$