You need to learn about program structure and data structures. Here is an example. I recommend you don't submit it verbatim unless you understand it properly:
my $grocerylist = {
Eggs => '1.99',
Milk => '1.75',
Cookies => '2.99',
Carrots => '1.25',
Eggplant => '1.89',
Cereal => '3.25',
Gum => '0.75',
Juice => '1.99'
};
my $cart = {
items => {},
total => 0,
cash => 0,
};
print "Welcome to the Acme(tm) grocery store.\n";
print "How much do you have to spend today? ";
chomp ($cart->{cash} = <STDIN>);
printf "You have: \$%.2f\n", $cart->{cash};
while ( ( $cart->{cash} - $cart->{total} ) > 0) {
my $action = menu();
if ( $action eq 'Q') {
quit($cart);
}
elsif ($action eq 'Showall' ) {
showall($grocerylist);
}
elsif ($action eq 'Cart'){
cart($cart);
}
elsif (exists $grocerylist->{$action}){
add_cart( $cart, $grocerylist, $action );
}
else {
print "\n*****Don't know how to do $action\n\n";
}
}
sub add_cart {
my ( $cart, $grocerylist, $item ) = @_;
if ( ($cart->{total} + $grocerylist->{$item}) > $cart->{cash} ) {
printf "\nSorry you can't afford '%s' @ \$%.2f as you only hav
+e \$%.2f\n",
$item, $grocerylist->{$item}, $cart->{cash}-$cart->{total}
+;
}
else {
$cart->{items}->{$item}++;
$cart->{total} += $grocerylist->{$item};
print "\nAdded $item to cart OK\n";
}
}
sub menu {
print qq!
Enter:
item name,
'cart' to view your current purchases,
'showall' to show all available items.
'q' to quit and display purchases.
Action: !;
chomp (my $action = <STDIN>);
$action = ucfirst(lc $action);
return $action;
}
sub quit {
my $cart = shift;
checkout($cart);
}
sub cart {
my $cart = shift;
print "This is Cart so far:\n\n";
printf("%-15s %s\n" .('-'x25) ."\n", "Item", "Quantity");
printf ("%-15s %s\n", $_, $cart->{items}->{$_}) for keys %{$cart->
+{items}};
printf "
Spent \$%.2f
Budget: \$%.2f
Remaining: \$%.2f\n",
$cart->{total}, $cart->{cash}, $cart->{cash} - $cart->{total};
}
sub showall {
my $grocerylist = shift;
printf("%-15s %s\n" . ('-'x25) ."\n", 'Item', 'Price');
printf("%-15s %s\n", $_, $grocerylist->{$_}) for keys %$grocerylis
+t;
}
sub checkout {
my $cart = shift;
require Data::Dumper;
print Data::Dumper::Dumper($cart);
exit 0;
}
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