Can you fix my code it says: On line $73$ and $85[$Error$]$ 'class studentList' has no memeber named 'end'

#include

#include

#include

#include #include $<$ list$>$

using namespace std;

ifstream infile;

struct studentNode $\{$

string firstName;

string lastName;

string id;

double gpa;

$\}$;

class studentList $\{$

list students;

public:

void addStudent$($const studentNode& student$)\{$

students.push$\_$front$($student$)$;

$\}$

void deleteStudent$($const string& id$)\{$

for $($list::iterator it $=$ students.begin$()$; it $!=$ students.end$()$; $++$it$)\{$

if $($it$->$id $==$ id$)\{$

students.erase$($it$)$;

cout $<<$ "Student ID: $"<<$ id $<<"$ has been deleted" $<<$ endl;

return;

$\}$

$\}$

cout $<<$ "Student with ID: $"<<$ id $<<"$ not found" $<<$ endl;

$\}$

list::iterator locateStudent$($const string& id$)\{$

for $($list::iterator it $=$ students.begin$()$; it $!=$ students.end$()$; $++$it$)\{$

if $($it$->$id $==$ id$)\{$

return it;

$\}$

$\}$

return students.end$()$; $//$ Return end iterator if not found

$\}$

void print$()\{$

for $($list::iterator it $=$ students.begin$()$; it $!=$ students.end$()$; $++$it$)\{$

cout $<<$ it$->$firstName $<<""<<$ it$->$lastName $<<""<<$ it$->$id $<<""<<$ it$->$gpa $<<$ endl;

$\}$

cout $<<$ endl;

$\}$

$\}$;

void processAdd$($studentList& students$)\{$

studentNode s;

infile $>>$ s$.$firstName;

infile $>>$ s$.$lastName;

infile $>>$ s$.$id;

infile $>>$ s$.$gpa;

students.addStudent$($s$)$;

$\}$

void processDelete$($studentList& students$)\{$

string id;

infile $>>$ id;

students.deleteStudent$($id$)$;

$\}$

void processSearch$($studentList& students$)\{$

string id;

infile $>>$ id;

list::iterator it $=$ students.locateStudent$($id$)$;

Line $73$: if $($it $!=$ students.end$())\{$

cout $<<$ "Information Located: $"<<$ it$->$firstName $<<""<<$ it$->$lastName $<<""<<$ it$->$id $<<""<<$ it$->$gpa $<<$ endl;

$\}$ else $\{$

cout $<<$ "Information: $"<<$ id $<<"$ cannot be found." $<<$ endl;

$\}$

$\}$

void processChange$($studentList& students$)\{$

string id;

double gpa;

infile $>>$ id $>>$ gpa;

list::iterator it $=$ students.locateStudent$($id$)$;

Line $85$: if $($it $!=$ students.end$())\{$

it$->$gpa $=$ gpa;

$\}$ else $\{$

cout $<<$ "Student ID $"<<$ id $<<"$ not found" $<<$ endl;

$\}$

$\}$

int main$()\{$

char code;

studentList students;

infile.open$("$updates$.$txt$")$;

while $($infile $>>$ code$)\{$

switch $($code$)\{$

case $\text{'}$A$\text{'}$:

case $\text{'}$a$\text{'}$:

processAdd$($students$)$;

students.print$()$;

break;

case $\text{'}$D$\text{'}$:

case $\text{'}$d$\text{'}$:

processDelete$($students$)$;

students.print$()$;

break;

case $\text{'}$S$\text{'}$:

case $\text{'}$s$\text{'}$:

processSearch$($students$)$;

break;

case $\text{'}$C$\text{'}$:

case $\text{'}$c$\text{'}$:

processChange$($students$)$;

students.print$()$;

break;

default:

cout $<<$ "Invalid code $"<<$ code $<<$ endl;

break;

$\}$

$\}$

return $0$;

$\}$