Get user input x times and output all dog data sets - ruby

Question

I am creating a program which creates a record for a Dog, that has the attributes (id, breed year born, and name). I have to use arrays to store the attributes of 3 dogs and then print them to the terminal.
require './input_functions'
class Dog
attr_accessor :id, :breed, :year_born, :name
def initialise (id, breed, year_born, name)
#id = id
#breed = breed
#year_born = year_born
#name = name
end
end
# Complete the missing code below
# Note: If your tasks requires outputting a floating point number you may wish to use the following:
# print out my_variable with 2 decimal places:
# printf("$%.2f\n", my_variable)
def read_dog()
puts "Enter the ID of your dog"
$dog_id = gets.to_s
puts "Enter the Breed of your dog"
$dog_breed = gets.to_s
puts "Enter the birth year of your dog"
$dog_year_born = gets.to_s
puts "Enter the name of your dog"
$dog_name = gets.to_s
end
def display_dog
puts $dog_id + "The dog ID is an Integer which is unique to your dog"
puts $dog_breed + "The dog breed is a String which defines the ancestors of your dog"
puts $dog_year_born + "The year born is an Integer which contains what year your dog was born"
puts $dog_name + "The dog name is a String which contains what your dog's name is"
end
def read_dogs
dogs = Array.new
index = 0
while (index < 3)
dogs << read_dog[index]
index = index + 1
end
return dogs
end
def display_dogs(dogs)
index = 0
while (index < 3)
dogs[display_dog.to_i]
index = index + 1
end
end
def main
dogs = read_dogs
display_dogs(dogs)
end
main
The expected result is that the program displays all entered information back to the user. What happens instead is that only the last set of data that is entered is shown three times. It obviously has something to do with how I am storing or extracting the data from the array but I can't figure out what that is.

Answer 1

First of all you must return some value from read_dog method
def read_dog()
puts "Enter the ID of your dog"
$dog_id = gets.to_s
puts "Enter the Breed of your dog"
$dog_breed = gets.to_s
puts "Enter the birth year of your dog"
$dog_year_born = gets.to_s
puts "Enter the name of your dog"
$dog_name = gets.to_s
return [$dog_id, $dog_breed, $dog_year_born, $dog_name]
end
Let me update you on other things as it only printing last information
Btw I am not seeing any use of Dog class code in your snippet at the moment

Answer 2

class Dog
attr_accessor :id, :breed, :year_born, :name
def self.ask_for_dogs(n_times)
all_dogs = []
n_times.times do
all_dogs << new
end
all_dogs
end
def self.display(dogs)
dogs.each do |dog|
puts "Id: #{dog.id}"
puts "Name: #{dog.name}"
puts "Breed: #{dog.breed}"
puts "Year born: #{dog.year_born}\n"
end
end
private
def initialize
puts "Enter the dog's ID:"
#id = gets.to_s
puts "Enter the dog's breed:"
#breed = gets.to_s
puts "Enter the dog's birth year:"
#year_born = gets.to_s
puts "Enter the dog's name:"
#name = gets.to_s
end
end
Run it, by defining the number of dogs you want to create.
In the loop dog objects are created, which are then printed out by the diplay method all at once, by accessing the attributes of the dog object.
dogs = Dog.ask_for_dogs(3)
Dog.display(dogs)