Jackie - Calculator Assignment

calculator.rb

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+# My calculator program!
+# Jackie Watanabe
+# February 9th, 2017
+# Program that prompts user and gets numbers and calculates answer using mathematical operations
+
+puts "Hello! Welcome to my Calculator!\n\n\nPlease enter a number: "
+number1 = gets.chomp.to_i
+puts "Please enter another number! "
+number2= gets.chomp.to_i
+puts "Ok, now what do you want to do with the numbers? [+ (or \'add\'), - (or \'subtract\'), * (or \'multiply\'), / (or \'divide\')]"
+
+user_operation = gets.chomp
+
+operation_choices = ["add", "+", "subtract", "-", "multiply", "*", "divide", "/"]
+
+until operation_choices.include?(user_operation)
+  puts "I'm very particular. I only accept add, +, subtract, -, multiply, *, divide, or /.\nPlease enter one of these commands: "
+  user_operation = gets.chomp
+end
+
+
+# I originally did a bunch of conditionals to try and eliminate user inputs that did not match
+
+# until user_operation == "add" || user_operation == "+" || user_operation == "subtract" || user_operation == "-" || user_operation == "multiply" || user_operation == "*" || user_operation == "divide" || user_operation == "/"
+#   puts "I'm very particular. I only accept add, +, subtract, -, multiply, *, divide, or /.\nPlease enter one of these commands: "
+#   user_operation = gets.chomp
+# end
+
+
+### I thought about creating a method to try and automatically do calculation
+# operator = [+, -, * , /]
+#
+# if user_operation.downcase == "add" || user_operation == "+"
+#   operator =
+# elsif user_operation.downcase == "subtract" || user_operation == "-"
+#   operator = "-"
+# elsif user_operation.downcase == "multiply" || user_operation == "*"
+#   operator = "*"
+# elsif user_operation.downcase == "divide" || user_operation == "/"
+#   operator = "/"
+# end
+#
+# def math(num1, num2, answer1)
+#   puts "#{number1} " " #{number2} = #{answer}"
+# end
+
+### I created methods here for each mathematical operation....not sure if this is the part I was supposed to turn into methods, or if it's another part of the code....?
+
+def addition(num1, num2)
+  answer = num1 + num2
+  puts "#{num1} + #{num2} = #{answer}"
+end
+
+def subtraction(num1, num2)
+  answer = num1 - num2
+  puts "#{num1} - #{num2} = #{answer}"
+end
+
+def multiplication(num1, num2)
+  answer = num1 * num2
+  puts "#{num1} * #{num2} = #{answer}"
+end
+
+def division(num1, num2)
+  answer = num1 / num2
+  puts "#{num1} / #{num2} = #{answer}"
+end
+
+case user_operation
+  when "add", "+"
+    addition(number1, number2)
+  when "subtract", "-"
+    subtraction(number1, number2)
+  when "multiply", "*"
+    multiplication(number1, number2)
+  when "divide", "/"
+    division(number1, number2)
+  else
+    puts "I dunno, man"
+end
+
+
+
+### This was my original code before I created methods.
+
+# case user_operation
+#   when "add", "+"
+#     answer = number1 + number2
+#     puts "#{number1} + #{number2} = #{answer}"
+#   when "subtract", "-"
+#     answer = number1 - number2
+#     puts "#{number1} - #{number2} = #{answer}"
+#   when "multiply", "*"
+#     answer = number1 * number2
+#     puts "#{number1} * #{number2} = #{answer}"
+#   when "divide", "/"
+#     answer = number1 / number2
+#     puts "#{number1} / #{number2} = #{answer}"
+#   else
+#     puts "I dunno, man"
+# end