#include #include #include #define SIZE $5000$ #define THREADS $8$ int numbers$[$SIZE$]$; int partial$\_$sums$[$THREADS$]=\{0\}$; $//$ To store sum from each thread $//$ Function to read integers from file and store in global array void readfile$($const char $*$filename$)\{$ FILE $*$file $=$ fopen$($filename$,"$r$")$; if $($file $==$ NULL$)\{$ perror$("$Unable to open file"$)$; exit$(1)$; $\}$ for $($int i $=0$; i $$ SIZE; i$++)\{$ fscanf$($file$,"\%$d$",$ &numbers$[$i$])$; $\}$ fclose$($file$)$; $\}//$ Thread function to compute the sum of a segment void $*$compute$\_$sum$($void $*$arg$)\{$ int thread$\_$id $=*($int $*)$arg; int start $=$ thread$\_$id $*($SIZE $/$ THREADS$)$; int end $=$ start $+($SIZE $/$ THREADS$)$; for $($int i $=$ start; i $$ end; i$++)\{$ partial$\_$sums$[$thread$\_$id$]+=$ numbers$[$i$]$; $\}$ printf$("$Thread $\%$d Sum: $\%$d

$",$ thread$\_$id $+1,$ partial$\_$sums$[$thread$\_$id$])$; pthread$\_$exit$(0)$; $\}$ int main$($int argc, char $*$argv$[])\{$ if $($argc $!=2)\{$ fprintf$($stderr$,$ "Usage: $\%$s

$",$ argv$[0])$; return $1$; $\}$ readfile$($argv$[1])$; printf$("$Reading file: $\%$s

$",$ argv$[1])$; pthread$\_$t threads$[$THREADS$]$; int thread$\_$ids$[$THREADS$]$; int total$\_$sum $=0$; $//$ Create threads for $($int i $=0$; i $$ THREADS; i$++)\{$ thread$\_$ids$[$i$]=$ i; pthread$\_$create$($&threads$[$i$],$ NULL, compute$\_$sum, &thread$\_$ids$[$i$])$; $\}//$ Wait for threads to complete for $($int i $=0$; i $$ THREADS; i$++)\{$ pthread$\_$join$($threads$[$i$],$ NULL$)$; total$\_$sum $+=$ partial$\_$sums$[$i$]$; $//$ Sum up each thread's partial result $\}$ printf$("$Total Sum is: $\%$d

$",$ total$\_$sum$)$; return $0$; $\}$

Reading file: input.txt

Thread $3$ Sum: $0$

Thread $1$ Sum: $13568$

Thread $2$ Sum: $7634$

Thread $4$ Sum: $0$

Thread $5$ Sum: $0$

Thread $6$ Sum: $0$

Thread $7$ Sum: $0$

Thread $8$ Sum: $0$

Total Sum is: $21202$

Why i got output like this $?$