#include

#include

#include

#include

#define PASS$\_$THRESHOLD $50//$ Minimum average to pass

$//$ Global variables for statistics

int $*$students$\_$passing$\_$per$\_$question; $//$ Array for passing stats per question

int total$\_$students$\_$passing $=0$;

int highest$\_$grade $=0,$ lowest$\_$grade $=100$; $//$ Start with extreme values

sem$\_$t stats$\_$semaphore; $//$ Semaphore to protect shared stats

typedef struct $\{$

int student$\_$id;

int num$\_$grades;

int $*$grades;

$\}$ StudentData;

$//$ Function to process each student's data

void$*$ process$\_$student$($void$*$ arg$)\{$

StudentData$*$ data $=($StudentData$*)$arg;

float sum $=0$;

for $($int i $=0$; i $$ data$->$num$\_$grades; i$++)\{$

sum $+=$ data$->$grades$[$i$]$;

$//$ Update per$-$question passing stats safely

if $($data$->$grades$[$i$]>=$ PASS$\_$THRESHOLD$)\{$

sem$\_$wait$($&stats$\_$semaphore$)$;

students$\_$passing$\_$per$\_$question$[$i$]++$;

sem$\_$post$($&stats$\_$semaphore$)$;

$\}$

$\}$

float average $=$ sum $/$ data$->$num$\_$grades;

$//$ Update overall stats safely

sem$\_$wait$($&stats$\_$semaphore$)$;

if $($average $>=$ PASS$\_$THRESHOLD$)\{$

total$\_$students$\_$passing$++$;

$\}$

for $($int i $=0$; i $$ data$->$num$\_$grades; i$++)\{$

if $($data$->$grades$[$i$]>$ highest$\_$grade$)\{$

highest$\_$grade $=$ data$->$grades$[$i$]$;

$\}$

if $($data$->$grades$[$i$]$ lowest$\_$grade$)\{$

lowest$\_$grade $=$ data$->$grades$[$i$]$;

$\}$

$\}$

sem$\_$post$($&stats$\_$semaphore$)$;

$//$ Print student result

printf$("\%$d $\%\mathrm{.}2$f $\%$s

$",$ data$->$student$\_$id$,$ average, average $>=$ PASS$\_$THRESHOLD $?$ "Passed" : "Failed"$)$;

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

$\}$

int main$()\{$

FILE $*$input$\_$file $=$ fopen$("$input$.$txt$","$r$")$;

if $($input$\_$file $==$ NULL$)\{$

perror$("$Error opening input file"$)$;

return $1$;

$\}$

int num$\_$students, num$\_$questions;

fscanf$($input$\_$file, $"\%$d$",$ &num$\_$students$)$;

fscanf$($input$\_$file, $"\%$d$",$ &num$\_$questions$)$;

students$\_$passing$\_$per$\_$question $=($int$*)$calloc$($num$\_$questions, sizeof$($int$))$;

sem$\_$init$($&stats$\_$semaphore, $0,1)$;

pthread$\_$t threads$[$num$\_$students$]$;

StudentData student$\_$data$[$num$\_$students$]$;

for $($int i $=0$; i $$ num$\_$students; i$++)\{$

student$\_$data$[$i$].$grades $=($int$*)$malloc$($num$\_$questions $*$ sizeof$($int$))$;

student$\_$data$[$i$].$num$\_$grades $=$ num$\_$questions;

fscanf$($input$\_$file, $"\%$d$",$ &student$\_$data$[$i$].$student$\_$id$)$;

for $($int j $=0$; j $$ num$\_$questions; j$++)\{$

fscanf$($input$\_$file, $"\%$d$",$ &student$\_$data$[$i$].$grades$[$j$])$;

$\}$

pthread$\_$create$($&threads$[$i$],$ NULL, process$\_$student, &student$\_$data$[$i$])$;

$\}$

for $($int i $=0$; i $$ num$\_$students; i$++)\{$

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

free$($student$\_$data$[$i$].$grades$)$;

$\}$

fclose$($input$\_$file$)$;

$//$ Print overall statistics

printf$("$

$---$ Overall Statistics $---$

$")$;

printf$("$Number of students passing each question:

$")$;

for $($int i $=0$; i $$ num$\_$questions; i$++)\{$

printf$("$Question $\%$d: $\%$d students passed.

$",$ i $+1,$ students$\_$passing$\_$per$\_$question$[$i$])$;

$\}$

printf$("$Total number of students who passed overall: $\%$d

$",$ total$\_$students$\_$passing$)$;

printf$("$Highest grade: $\%$d

$",$ highest$\_$grade$)$;

printf$("$Lowest grade: $\%$d

$",$ lowest$\_$grade$)$;

free$($students$\_$passing$\_$per$\_$question$)$;

sem$\_$destroy$($&stats$\_$semaphore$)$;

return $0$;

$\}$

In this code, my output should be like the result output when given the input I have added in the photos, but my result is like the result of out$32.$ I can not understand the problem, I need a correction in my code, thanks in advance.

input:

$3$

$4$

$10178859045$

$10245605530$

$10388929590$

results.txt :

Dosya D$$zen Bi$$im G$$r$$n$$m Yard$$m

$10174\mathrm{.}50$ Passed

$10247\mathrm{.}50$ Failed

$10391\mathrm{.}25$ Passed

$---$ Overall Statistics $---$

Number of students passing each question:

Question $1$: $2$ students passed.$|$

Question $2$: $3$ students passed.

Question $3$: $2$ students passed.

Question $4$: $1$ students passed.

Total number of students who passed overall: $2$

Highest grade: $95$

Lowest grade: $30$

out$32$:

$10174\mathrm{.}50$ Passed

$10247\mathrm{.}50$ Failed

$10391\mathrm{.}25$ Passed

$---$ Overall Statistics $---$

Number of students passing each question:

Question $1$: $2$ students passed.

Question $2$: $3$ students passed.

Question $3$: $3$ students passed.

Question $4$: $1$ students passed.

Total number of students who passed overall: $2$

Highest grade: $95$

Lowest grade: $30$

input.txt $-$ Not Defteri