overloded problem please fix for me :

#include

#include

#include "table.h$"$

#include

using namespace std;

$//$ Define the states and events $($already defined in your problem statement$)$

enum STATE $\{$ nke, ok$1,$ ok$2,$ ok$3,$ fa$1,$ fa$2,$ fa$3\}$;

typedef enum EVENT $\{$ A$,$ B$,$ C$,$ D$,$ E$,$ F $\}$ anEvent;

int mapping$($const Pair& p$)$

$\{$

return $($p$.$first $*6)+$ p$.$second;

$\}$

int main$()\{$

std::ifstream combinationFile$("$correct$\_$combination.txt$")$;

if $(!$combinationFile.is$\_$open$())$

$\{$

std::cerr $$ "Error: Could not open combination file." $$ std::endl;

return $1$;

$\}$

std::string correctCombination;

std::getline$($combinationFile$,$ correctCombination$)$;

combinationFile.close$()$;

Table, STATE$>$ transition$\_$table$(21,$ mapping$)$;

Table, std::string $>$ action$\_$table$(21,$ mapping$)$;

transition$\_$table.insert$($makePair$($makePair$($nke$,$ A$),$ fa$1))$;

action$\_$table.insert$($makePair$($makePair$($nke$,$ A$),$ "alarm"$))$;

std::string enteredCombination;

std::cout $$ "Enter the combination: $"$;

std::getline$($std::cin, enteredCombination$)$;

STATE currentState $=$ nke;

bool unlocked $=$ false;

for $($char ch : enteredCombination$)\{$

anEvent event;

switch $($ch$)$

$\{$

case $\text{'}$A$\text{'}$: event $=$ A; break;

case $\text{'}$B$\text{'}$: event $=$ B; break;

case $\text{'}$C$\text{'}$: event $=$ C; break;

case $\text{'}$D$\text{'}$: event $=$ D; break;

case $\text{'}$E$\text{'}$: event $=$ E; break;

case $\text{'}$F$\text{'}$: event $=$ F; break;

default:

std::cerr $$ "Invalid character entered." $$ std::endl;

return $1$;

$\}$

Pair key $=$ makePair$($currentState$,$ event$)$;

int index $=$ mapping$($key$)$;

currentState $=$ transition$\_$table.lookUp$($key$)$;

std::string action $=$ action$\_$table.lookUp$($key$)$;

if $($action $==$ "unlock"$)$

$\{$

unlocked $=$ true;

break;

$\}$

else if $($action $==$ "alarm"$)$

$\{$

std::cout $$ "Alarm! Incorrect combination." $$ std::endl;

break;

$\}$

$\}$

if $($unlocked$)$

$\{$

std::cout $$ "Lock unlocked!" $$ std::endl;

$\}$

else if $(!$unlocked && enteredCombination.size$()==$ correctCombination.size$())$

$\{$

std::cout $$ "Incorrect combination." $$ std::endl;

$\}$

return $0$;

$\}$

Problem show in the picture please solve for me