in this c$++$ program how can i finish the int main step in order to display a menu for teh membership options and read the user's selection into the variable 'choice'

$*$ Function Description:

$*$ The function will first ask the user what type of membership they have,

$*$ including error checking. Once the user has made a valid selection, it will

$*$ then ask the user how many months they want to purchase. Finally, it will

$*$ calculate and display the membership charges formatted to $2$ decimal places.

$*$

$*$ Pseudocode:

$*$ Level $0$

$*-------$

$*$ Display membership menu and ask for a selection

$*$ Ask how many months purchased

$*$ Calculate membership charges

$*$ Set formatting for $2$ decimal places

$*$ Display membership charges

$*$ Level $1$

$*-------$

$*$ Display membership menu and ask for a selection

$*$

$*$ Ask how many months purchased

$*$ Output "How many months: $"$

$*$ Input months

$*$ Calculate membership charges

$*$ If choice $==$ ADULT$\_$CHOICE Then

$*$ charges $=$ months $*$ ADULT

$*$ Else If choice $==$ CHILD$\_$CHOICE Then

$*$ charges $=$ months $*$ CHILD

$*$ Else

$*$ charges $=$ months $*$ SENIOR

$*$ End

$*$ Display membership charges

$*$ Output EOL, EOL

$*$ Output "Your membership charges are $$",$ charges, EOL

$*******************************************************************************/$

int main$()$

$\{$

$//$Local constants

const int ADULT$\_$CHOICE $=1$; $//$Menu choice for Adult membership

const int CHILD$\_$CHOICE $=2$; $//$Menu choice for Child membership

const int SENIOR$\_$CHOICE $=3$; $//$Menu choice for Senior membership

const float ADULT $=40\mathrm{.}00$; $//$Monthly membership fee for Adult membership

const float CHILD $=20\mathrm{.}00$; $//$Monthly membership fee for Child membership

const float SENIOR $=30\mathrm{.}00$; $//$Monthly membership fee for Senior membership

$//$Local variables

int choice; $//$Menu choice of what type of membership user wants to purchase

int months; $//$Number of months user wishes to purchase membership

float charges; $//$Total membership charges

$/*******************$ Begin main Function Executables $**********************/$

$//$Display membership menu and ask for a selection

$//$Ask how many months purchased

cout $<<$ "How many months: $"$;

cin $>>$ months;

$//$Calculate membership charges

if $($choice $==$ ADULT$\_$CHOICE$)$

charges $=$ months $*$ ADULT;

else if $($choice $==$ CHILD$\_$CHOICE$)$

charges $=$ months $*$ CHILD;

else

charges $=$ months $*$ SENIOR;

$//$Set formatting for $2$ decimal places

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

$//$Display membership charges

cout $<<"$

$"$;

cout $<<$ "Your membership charges are $$"<<$ charges $<<$ endl;

$//$Indicate to OS successful termination of program

return $0$;

$\}//$End main