Marisa Morris - Calculator

calculator_exercise.rb

@@ -0,0 +1,62 @@
+def do_math(num1,operator,num2)
+
+  if operator == "add" || operator == "+"
+    # operator = "+"
+    add_result = num1 + num2
+    puts "#{num1} + #{num2} = #{add_result}"
+  elsif operator == "subtract" || operator == "-"
+    # operator = "-"
+    sub_result = num1 - num2
+    puts "#{num1} - #{num2} = #{sub_result}"
+  elsif operator == "divide" || operator == "/"
+    # operator = "/"
+    if num2 == 0.0
+      puts "Sorry! ERROR"
+    else
+      divide_result = num1 / num2
+      puts "#{num1} / #{num2} = #{divide_result}"
+    end
+  elsif operator == "multiply" || operator == "*"
+    # operator = "*"
+    multiply_result = num1 * num2
+    puts "#{num1} * #{num2} = #{multiply_result}"
+  elsif operator == "modulo" || operator == "%"
+    # operator = "%"
+    modulo_result = num1 % num2
+    puts "#{num1} % #{num2} = #{modulo_result}"
+  else operator == "exponent" || operator == "**"
+    # operator = "**"
+    exponent_result = num1 ** num2
+    puts "#{num1} ** #{num2} = #{exponent_result}"
+  end
+end
+
+counter = 0
+until counter > 0
+  print "Welcome to the Crappy-Calculator\n\n"
+  print "Enter your two numbers: "
+  nums = gets.chomp.split
+
+    # regex is checking each index within the nums array for characters from the alphabet.
+    if /[a-zA-Z]/.match(nums[0]) || /[a-zA-Z]/.match(nums[1])
+      puts "Sorry I only work with numbers"
+    else
+      # if regex doesnt match anything from the two indeces, the variables are created and the conditionals and nested conditionals execute.
+      num1 = nums[0].to_f
+      num2 = nums[1].to_f
+
+      # num1.is_a? Float
+      print"Choose your mathmatical operator (add(+) subtract(-) multiply(*) divide(/) modulo(%) exponent(**): "
+      operator = gets.chomp
+      acceptable_operators = ["+","add","-","subtract","multiply","*","/","divide","modulo","%", "exponent","**"]
+
+        # if operator is included in the acceptable operators array, the conditional will complete and the counter will increase causing the loop to stop and the method to run.
+        if acceptable_operators.include? operator
+          counter +=1
+        else
+          puts "Sorry! not a valid operator"
+        end
+    end
+end
+
+do_math(num1,operator,num2)