Create Queues - Marisol Lopez - Calculator.rb

Queues - Marisol Lopez - Calculator.rb

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+# methods for performing math operation that is chosen by user
+# if statement is nested in divide to account for division by 0 possibility
+
+def add(num_one, num_two)
+  return num_one + num_two
+end
+
+def multiply(num_one, num_two)
+  return num_one * num_two
+end
+
+def subtract(num_one, num_two)
+  return num_one - num_two
+end
+
+def divide(num_one, num_two)
+  if num_one == 0 || num_two == 0
+    return "0.0"
+  else
+    return num_one / num_two
+  end
+end
+
+# Asking for user input
+
+puts "Do you want to add (+), subtract (-), multiply (*), or divide (/)?"
+
+operation = gets.chomp.downcase.to_s
+
+#storing number input and checking to see if number is a float
+
+print "Please enter in a number: "
+begin
+number_one = gets.chomp
+number_one = Float(number_one)
+rescue
+  print "Please enter as a numerical number: "
+  retry
+end
+
+print "Please enter in a number: "
+begin
+number_two = gets.chomp
+number_two = Float(number_two)
+rescue
+  print "Please enter as a numerical number: "
+  retry
+end
+
+# checking to see if operation user input matches and if it does
+# displaying the math operation based on user input
+
+case operation
+  when "add", "+"
+    puts "#{number_one} + #{number_two} = #{add(number_one,number_two)}"
+  when "subtract", "-"
+    puts "#{number_one} - #{number_two} = #{subtract(number_one,number_two)}"
+  when "multiply", "*"
+    puts "#{number_one} * #{number_two} = #{multiply(number_one,number_two)}"
+  when "divide", "/"
+    puts "#{number_one} / #{number_two} = #{divide(number_one,number_two)}"
+  end