How do I get my current ruby program to loop through three input options and display if the same opt-CodePudding

I am attempting to get my current program to give the user three different input options and notify the user if they have attempted to use the same input option twice. My current code:

prompt = "Do you want to use the Subscription coupon[1] the one-time pay-per-use 
coupon[2] or the gift purchase coupon[3]: "
print prompt
code = gets.chomp
code = code.to_i
history = []

loop do
    if code == 1
            puts "Subscription coupon used"
            print prompt
            code = gets.chomp
    elsif code == 2
            puts "One-time pay-per-use coupon used"
            print prompt
            code = gets.chomp
    elsif code == 3
            puts "Gift purchase coupon used"
            print prompt
            code = gets.chomp
    else history.include? code
            puts "Code already input"
            print prompt
            code = gets.chomp
    end
end

It is allowing me to input as many times as I want, but no matter what the second input is it prints the code already input text.

How do I fix the code to get it to run in the intended way?

CodePudding user response：

Move the history check to the beginning of your loop, and actually populate the history. Here's one of many ways to accomplish that:

loop do
  if history.include?(code)
    puts 'Code already input'
    print prompt
    code = gets.chomp
    next # Stop processing this iteration of the loop immediately, and skip to the next iteration.
  else
    history << code
  end

  if code == 1
    puts 'Subscription coupon used'
  elsif code == 2
    puts 'One-time pay-per-use coupon used'
  else code == 3
    puts 'Gift purchase coupon used'
  end

  print prompt
  code = gets.chomp
end