Hello my C$++$ program wontt run & i can figure out why. Could you help me

#include

#include

using namespace std;

int readAccountNo$()\{$

int accNo;

do $\{$

cout $<<$ "Enter an account number $($even$,$ positive, less than $10000)$: $"$;

cin $>>$ accNo;

$\}$ while $($accNo $\%2!=||$ accNo $<=||$ accNo $>=10000)$;

return accNo;

$\}$

double readBalanceAmount$()\{$

double balance;

do $\{$

cout $<<$ "Enter the opening balance amount $($$$1-$ $$200000)$: $"$;

cin $>>$ balance;

$\}$ while $($balance $<1||$ balance $>200000)$;

return balance;

$\}$

double calculateDeposit$($double balance$)\{$

double deposit;

cout $<<$ "Enter the amount to deposit: $"$;

cin $>>$ deposit;

return balance $+$ deposit;

$\}$

double addReturnBonus$($double openingBalance$)\{$

double bonusPercentage $=3\mathrm{.}5$;

double bonus $=($bonusPercentage $/100)*$ openingBalance;

return openingBalance $+$ bonus;

$\}$

void printAllInfo$($int accNo$1,$ double balance$1,$ int accNo$2,$ double balance$2,$ int accNo$3,$ double balance$3,$ int accNo$4,$ double balance$4)\{$

cout $<<$ fixed $<<$ setprecision$(2)$;

cout $<<$ "Account Balances for All Accounts:" $<<$ endl;

cout $<<$ "Account Number: $"<<$ accNo$1<<"\backslash$tBalance: $$"<<$ balance$1<<$ endl;

cout $<<$ "Account Number: $"<<$ accNo$2<<"\backslash$tBalance: $$"<<$ balance$2<<$ endl;

cout $<<$ "Account Number: $"<<$ accNo$3<<"\backslash$tBalance: $$"<<$ balance$3<<$ endl;

cout $<<$ "Account Number: $"<<$ accNo$4<<"\backslash$tBalance: $$"<<$ balance$4<<$ endl;

$\}$

int main$()\{$

cout $<<$ "Developer's Details:" $<<$ endl;

for $($int i $=1$; i $<=3$; i$++)\{$

cout $<<$ "Name: $[$Your Name$]"<<$ endl;

cout $<<"$CPS $171$ Section: $[$Your Section$]"<<$ endl;

cout $<<$ "Due Date: $[$Due Date$]"<<$ endl;

$\}$

int account$1,$ account$2,$ account$3,$ account$4$;

double balance$1,$ balance$2,$ balance$3,$ balance$4$;

cout $<<$ "Enter data for $4$ customers:" $<<$ endl;

for $($int i $=1$; i $<=4$; i$++)\{$

cout $<<$ "For customer $"<<$ i $<<"$:$"<<$ endl;

if $($i $==1)\{$

account$1=$ readAccountNo$()$;

balance$1=$ readBalanceAmount$()$;

$\}$ else if $($i $==2)\{$

account$2=$ readAccountNo$()$;

balance$2=$ readBalanceAmount$()$;

$\}$ else if $($i $==3)\{$

account$3=$ readAccountNo$()$;

balance$3=$ readBalanceAmount$()$;

$\}$ else $\{$

account$4=$ readAccountNo$()$;

balance$4=$ readBalanceAmount$()$;

$\}$

$\}$

balance$1=$ addReturnBonus$($balance$1)$;

balance$2=$ addReturnBonus$($balance$2)$;

balance$3=$ addReturnBonus$($balance$3)$;

balance$4=$ addReturnBonus$($balance$4)$;

char choice;

do $\{$

cout $<<$ "Main Menu:" $<<$ endl;

cout $<<"$A$-$ Do deposit" $<<$ endl;

cout $<<"$B$-$ View accounts" $<<$ endl;

cout $<<"$C$-$ Exit the program" $<<$ endl;

cout $<<$ "Enter your choice: $"$;

cin $>>$ choice;

switch$($choice$)\{$

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

cout $<<$ "Select an account to do a deposit:" $<<$ endl;

$//$ Implement deposit functionality for selected account

break;

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

printAllInfo$($account$1,$ balance$1,$ account$2,$ balance$2,$ account$3,$ balance$3,$ account$4,$ balance$4)$;

break;

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

cout $<<$ "Exiting the program. Goodbye!" $<<$ endl;

break;

default:

cout $<<$ "Invalid option. Please choose a valid option $($A$,$ B$,$ or C$)."<<$ endl;

$\}$

$\}$ while$($choice $!=\text{'}$C$\text{'})$;

return ;

$\}$