use c program

This is a multi$-$threaded implementation of your design about Problem $4$ of Homework $3.$ Four input files

have been provided $($downloadable at Canvas$),$ each containing several words. You will use four threads.

Each of your threads will read words $($via$.$ get$\_$words$())$ from one of the files $($e$.$g$.,$ Thread $1$ reads words

from $$dictionary$1.$txt$).$ You need to write a get$\_$words$()$ function to retrieve $($up to$)10$ words from a file.

$($the last call may get fewer than $10$ words$).$ At end of your program, print out number of unique words.

You will write two multi$-$threaded programs to solve the problem. The first program is a non$-$optimized

implementation that keeps all of the $$sequentially search the list to see if there is a match$$ in the critical

section. The second one is an optimized one that keeps most of the time spent on $$sequentially search the

list to see if there is a match$$ out of critical section for higher performance.

while $($num $=$ get$\_$words$($word$))\{$

for $($i $=0$; i $<$ num; i$++)\{$

$/*$ list is a string array storing all the distinct words that have been encountered so far

You can sequentially search the list to see if there is a match.

$*/$

if word$[$i$]$ is not in the list $\{$

increment the count about total number of unique words by one;

add word$[$i$]$ to list at the end of the list;

$\}$

$\}$

$\}$

Observation: for each program, report the number of words that are searched in the critical section by each

of its four threads $($that is$,$ you will report $8$ numbers, $4$ for each program$)$