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Listing 3

char *item_names[] = {
	"files",
	"messages",
	"tapes",
	"penguins",
	"floppies"
};
...
if((index >= 0) && (index <= 4))
	items = item_names[index];
else
	items = "unknown items";
printf("You have %d %s\n", quantity, items);