oid display$\_$days$($struct day $*$day$\_$one, struct day $*$current$\_$day$)\{$

struct day $*$current $=$ day$\_$one;

$//$ Iterate through all days

while $($current $!=$ NULL$)\{$

$//$ Check if the current day is the current day

int is$\_$current $=($current $==$ current$\_$day$)$;

$//$ Calculate the total income for the current day

double income $=$ total$\_$income$($current$)$;

$//$ Calculate the most popular signature crepe for the current day

char most$\_$pop $=$ calculate$\_$most$\_$popular$\_$signature$($current$->$orders$)$;

$//$ Print the information for the current day

print$\_$single$\_$day$($is$\_$current, current$->$date, most$\_$pop, income$)$;

$//$ Move to the next day if it exists

if $($current$->$next $!=$ NULL$)\{$

print$\_$arrow$()$;

current $=$ current$->$next;

$\}$ else $\{$

break; $//$ Exit the loop if current$->$next is NULL

$\}$

$\}$

$\}$

it keeps saying my current$->$next is uninitialised. I dont know what to do$.$