My code isn't opening the files that I have attached. What do I have wrong?

#include

#include

#include

#include

using namespace std;

const int NUM$\_$QUESTIONS $=20$;

int main$()\{$

char correctAnswers$[$NUM$\_$QUESTIONS$]$;

char studentAnswers$[$NUM$\_$QUESTIONS$]$;

$//$ Read correct answers from CorrectAnswers.txt

fstream correctFile$("$CorrectAnswers$.$txt$")$;

if $(!$correctFile$)\{$

cerr $<<$ "Error opening CorrectAnswers.txt

$"$;

return $1$;

$\}$

for $($int i $=0$; i $<$ NUM$\_$QUESTIONS; $++$i$)\{$

if $(!($correctFile $>>$ correctAnswers$[$i$]))\{$

cerr $<<$ "Error reading correct answers

$"$;

return $1$;

$\}$

$\}$

correctFile.close$()$;

$//$ Read student answers from StudentAnswers.txt

string studentFileName;

cout $<<$ "Enter the name of the student's file $($e$.$g$.,$ StudentAnswers.txt$)$: $"$;

cin $>>$ studentFileName;

fstream studentFile$("$StudentAnswers$.$txt$")$;

if $(!$studentFile$)\{$

cerr $<<$ "Error opening StudentAnswers.txt$"$;

return $1$;

$\}$

for $($int i $=0$; i $<$ NUM$\_$QUESTIONS; $++$i$)\{$

if $(!($studentFile $>>$ studentAnswers$[$i$]))\{$

cerr $<<$ "Error reading student answers

$"$;

return $1$;

$\}$

$\}$

studentFile.close$()$;

$//$ Evaluate student's performance

int numQuestionsMissed $=0$;

cout $<<"$

Questions missed by the student:

$"$;

for $($int i $=0$; i $<$ NUM$\_$QUESTIONS; $++$i$)\{$

if $($correctAnswers$[$i$]!=$ studentAnswers$[$i$])\{$

cout $<<$ "Question $"<<$ i $+1<<"$: Correct Answer $="<<$ correctAnswers$[$i$]$

$<<",$ Student Answer $="<<$ studentAnswers$[$i$]<<$ endl;

$++$numQuestionsMissed;

$\}$

$\}$

$//$ Display results

cout $<<"$

Total number of questions missed: $"<<$ numQuestionsMissed $<<$ std::endl;

double percentageCorrect $=$ NUM$\_$QUESTIONS$-$numQuestionsMissed $*100\mathrm{.}0/$ NUM$\_$QUESTIONS;

cout $<<$ "Percentage of questions answered correctly: $"<<$ fixed $<<$ setprecision$(2)<<$ percentageCorrect $<<"\%$

$"$;

if $($percentageCorrect $>=70\mathrm{.}0)\{$

cout $<<$ "Student passed the exam.

$"$;

$\}$

else $\{$

cout $<<$ "Student failed the exam.

$"$;

$\}$

return $0$;

$\}$