From 3233a623d0c5dadb14ea336e68cfc0dffec771bd Mon Sep 17 00:00:00 2001
From: mgraonic <m.graonic@gmail.com>
Date: Wed, 7 Feb 2018 10:29:13 -0800
Subject: [PATCH 1/2] Create calculator.rb

---
 calculator.rb | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 calculator.rb

diff --git a/calculator.rb b/calculator.rb
new file mode 100644
index 0000000..934f55b
--- /dev/null
+++ b/calculator.rb
@@ -0,0 +1,79 @@
+
+
+def add(num1, num2)
+  return num1 + num2
+end
+
+def subtract(num1, num2)
+  return num1 - num2
+end
+
+def multiply(num1, num2)
+  return num1 * num2
+end
+
+def divide(num1, num2)
+  if num2 != 0
+    return num1 / num2
+  else
+    puts "Operation not possible. Division by zero is not allowed."
+  end
+end
+
+def modulo(num1, num2)
+  return num1 % num2
+end
+
+def exponify(num1, num2)
+  return num1 ** num2
+end
+
+puts "Enter the operation you would like:"
+operation = gets.chomp
+
+until ["add", "+", "subtract", "-", "multiply", "*", "divide", "/", "exponify", "**", "modulo", "%"].include?(operation)
+  puts "Please tell me to add (+), subtract (-), multiply (*), divide (/), exponify (**), or modulo (%)!"
+  operation = gets.chomp
+end
+
+puts "Enter the first number:"
+num1 = gets.chomp
+
+#regex to check for a numeral
+# lines 44-59 should be condensed into a method somehow
+while num1 !~ /^-?[0-9]+$/
+  puts "Please enter a valid number:"
+  num1 = gets.chomp
+end
+
+num1 = num1.to_f
+
+puts "Enter the second number:"
+num2 = gets.chomp
+
+while num2 !~ /^-?[0-9]+$/
+  puts "Please enter a valid number:"
+  num2 = gets.chomp
+end
+
+num2 = num2.to_f
+
+# case statements only accept strings (?)
+case operation
+  when "add", "+"
+  answer = add(num1,num2)
+  when "subtract", "-"
+  answer = subtract(num1,num2)
+  when "multiply", "*"
+  answer = multiply(num1,num2)
+  when "divide", "/"
+  answer = divide(num1,num2)
+  when "exponify", "**"
+  answer = exponify(num1,num2)
+  when "modulo", "%"
+  answer = modulo(num1,num2)
+  else
+  puts "Please enter a valid operation."
+end
+
+puts "Answer: #{answer}"

From ce2887baa20fd4680e43c645f42032903c6ca75a Mon Sep 17 00:00:00 2001
From: mgraonic <m.graonic@gmail.com>
Date: Wed, 7 Feb 2018 10:31:28 -0800
Subject: [PATCH 2/2] Update calculator.rb

---
 calculator.rb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/calculator.rb b/calculator.rb
index 934f55b..3253282 100644
--- a/calculator.rb
+++ b/calculator.rb
@@ -1,5 +1,3 @@
-
-
 def add(num1, num2)
   return num1 + num2
 end