This code isn't running because of the rand$\_$r in line $83.$ Can you help me fix it$?$

#include

#include

#include

#define MAX$\_$THREADS $512$

void $*$compute$\_$pi$($void $*)$;

long sample$\_$points;

long total$\_$hits;

long total$\_$misses;

long hits$[$MAX$\_$THREADS$]$;

long sample$\_$points$\_$per$\_$thread;

int num$\_$threads;

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

$\{$

$/*$ local variables $*/$

int ii;

int retval;

pthread$\_$t p$\_$threads$[$MAX$\_$THREADS$]$;

pthread$\_$attr$\_$t attr;

double computed$\_$pi;

$/*$ initialize local variables $*/$

retval $=0$;

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

pthread$\_$attr$\_$setscope$($&attr, PTHREAD$\_$SCOPE$\_$SYSTEM$)$;

$/*$ parse command line arguments into sample points and number of threads $*/$

$/*$ there is no error checking here!!!!! $*/$

sample$\_$points $=$ atol$($argv$[1])$;

num$\_$threads $=$ atoi$($argv$[2])$;

$/*$ uncomment this block if you want interactive input!!!!

$/*$ if so$...$comment out the two statements above $*/$

printf$($ "Enter number of sample points: $")$;

scanf$("\%$d$",$ &sample$\_$points $)$;

printf$($ "Enter number of threads: $")$;

scanf$("\%$d$\%",$ &num$\_$threads $)$;

total$\_$hits $=0$;

sample$\_$points$\_$per$\_$thread $=$ sample$\_$points $/$ num$\_$threads;

for $($ii $=0$; ii $<$ num$\_$threads; ii$++)$

$\{$

hits$[$ii$]=$ ii;

pthread$\_$create$($&p$\_$threads$[$ii$],$ &attr, compute$\_$pi$,($void $*)$&hits$[$ii$])$;

$\}$

for $($ii $=0$; ii $<$ num$\_$threads; ii$++)$

$\{$

pthread$\_$join$($p$\_$threads$[$ii$],$ NULL$)$;

total$\_$hits $+=$ hits$[$ii$]$;

$\}$

computed$\_$pi $=4\mathrm{.}0*($double$)$total$\_$hits $/(($double$)($sample$\_$points$))$;

printf$("$Computed PI $=\%$lf

$",$ computed$\_$pi$)$;

$/*$ return to calling environment $*/$

return $($retval$)$;

$\}$

void $*$compute$\_$pi$($void $*$s$)$

$\{$

int seed;

long ii;

long $*$hit$\_$pointer;

long local$\_$hits;

double rand$\_$no$\_$x;

double rand$\_$no$\_$y;

hit$\_$pointer $=($long $*)$s;

seed $=*$hit$\_$pointer;

local$\_$hits $=0$;

for $($ii $=0$; ii $<$ sample$\_$points$\_$per$\_$thread; ii$++)$

$\{$

rand$\_$no$\_$x $=($double$)($rand$\_$r$($&seed$))/($double$)$RAND$\_$MAX;

rand$\_$no$\_$y $=($double$)($rand$\_$r$($&seed$))/($double$)$RAND$\_$MAX;

if $((($rand$\_$no$\_$x $-0\mathrm{.}5)*($rand$\_$no$\_$x $-0\mathrm{.}5)+$

$($rand$\_$no$\_$y $-0\mathrm{.}5)*($rand$\_$no$\_$y $-0\mathrm{.}5))<=0\mathrm{.}25)$

local$\_$hits$++$;

seed $*=$ ii;

$\}$

$*$hit$\_$pointer $=$ local$\_$hits;

pthread$\_$exit$(0)$;

$\}$

Promppt: The first part of this assignment is to explore the use of threads in an application that computes PI$.$ Download the compute$\_$pi$\_$montecarlo.c $($compile: gcc compute$\_$pi$\_$montecarlo.c $-$o pi $-$lpthread$)($execute: $./$pi $800008)$ program to your Project$3$ subdirectory. Compile and run this program a few times to understand the basic operation and to verify that it does approximate PI$.$ Next, time your program and$/$or add appropriate timing system calls to your code. Run the application varying the number of threads and number of sample points. You may get a core dump when you exceed the number of threads permitted $($note that value$).$ Record the time$($s$)$ it takes your program to execute when changing the number of threads and number of sample points.

$1.$ Create a plot of time vs$.$ number of threads when the number of sample points is fixed.

$2.$ Create a plot of time vs$.$ number of sample points when the number of threads is fixed.

Use an Excel like application to create your plot