From edb2766f743731c9d4998beac41f1f43914401ab Mon Sep 17 00:00:00 2001
From: Shonda860 <57575225+Shonda860@users.noreply.github.com>
Date: Wed, 5 Feb 2020 10:27:05 -0800
Subject: [PATCH] Day 2 - Homework Calculator

---
 calculator.rb | 96 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 calculator.rb

diff --git a/calculator.rb b/calculator.rb
new file mode 100644
index 0000000..acdd9bd
--- /dev/null
+++ b/calculator.rb
@@ -0,0 +1,96 @@
+#calculator design
+puts "         CALCULATOR               "
+puts "      (AC) (+/-) (%) (/)          "
+puts "__________________________________"
+puts "                       division(/)"
+puts "                       multiply(*)"
+puts "                       subtract(-)"
+puts "                       addition(+)"
+puts "                    expoponets(**)"
+# puts "                  parenthises( )"
+
+#user_inputs
+#user enter numbers, checks for valid entries 
+print "Enter a number_"
+num_one = gets.chomp
+
+#user inputs operator that is then checked againist list of command options
+print "Operator:"
+command = ["add","+","sub","-", "multi","*","divide","/","expo","**","mod","modulo","%","exponent"]
+operation = gets.chomp.downcase
+
+#search for commands using operation variable
+until command.include?(operation) == true
+    puts "Please enter a name operator"
+    operation = gets.chomp.downcase
+end
+
+#user enters second number
+print "Enter a number_"
+num_two = gets.chomp
+
+# checking for true intergers 
+def num_check(num_one,num_two)
+    num_one.to_i.to_s == num_one &&num_two.to_i.to_s == num_two || num_one.to_f.to_s == num_one &&num_two.to_f.to_s == num_two
+end
+
+# failsafe loop if num_check false
+until num_check(num_one,num_two) == true
+  print "Re-enter number"
+  num_one = gets.chomp
+  print "Please name an operator"
+  operation = gets.chomp.downcase
+  print "Re-enter number"
+  num_two = gets.chomp
+end
+
+# methods for math operations 
+def add(num_one,num_two)
+ puts "#{num_one} + #{num_two} = #{num_one + num_two}"
+end
+
+def sub(num_one,num_two)
+ puts "#{num_one} - #{num_two} = #{num_one - num_two}"
+end
+
+def multi(num_one,num_two)
+    puts "#{num_one} * #{num_two} = #{num_one - num_two}"
+end
+
+def div(num_one,num_two)
+    # return num_one / num_two
+     puts "#{num_one} / #{num_two} = #{num_one / num_two}"
+    rescue ZeroDivisionError
+    puts "ERROR #{num_one} can not be divided by #{num_two}"
+end
+
+def exponents(num_one,num_two)
+     puts "#{num_one} ** #{num_two} = #{num_one ** num_two}"
+end
+def modulo(num_one,num_two)
+     puts "#{num_one} % #{num_two} = #{num_one % num_two}"
+end
+# def paren(num_one,num_two)
+#     return (num_one operation num_two)
+# end
+
+# new variables assiged
+num_one = num_one.to_i
+num_two = num_two.to_i
+
+
+#math operation with results
+case operation
+when "add","addition", "+"
+puts add(num_one,num_two)
+when "sub","subtraction", "-"
+puts sub(num_one,num_two)
+when "multi","multiply", "*"
+puts multi(num_one,num_two)
+when "div","divide","/"
+puts div(num_one,num_two)
+when "expo","exponent","**"
+puts exponents(num_one,num_two)
+when "modulo","mod","%"
+puts modulo(num_one,num_two)
+end