binary to dec conversion exercise complete

lib/binary_to_decimal.rb

@@ -4,6 +4,51 @@
 # The least significant bit is at index 7.
 # Calculate  and return the decimal value for this binary number using
 # the algorithm you devised in class.
+
+=begin
+push each value to an bin_num array
+loop through bin num array and powers array by 7 - index
+e.g. 00000001 => 1 * (2**0) or 1
+push product of each bin num array and powers array to new sum array
+add up the total to get the decimal number
+=end
+require 'pry'
+def get_binary
+  binary_array = []
+  8.times do
+    print "Please enter a 0 or 1: "
+    num = gets.chomp
+    if !['0', '1'].include?(num) || num.size > 1
+      print 'You may only enter a 0 or 1: '
+      num = gets.chomp
+    end
+    binary_array << num.to_i
+  end
+  return binary_array
+end
+
+
 def binary_to_decimal(binary_array)
+  # p binary_array
+  sum_nums_arr = []
+  binary_array.each_with_index do |num, i|
+    k = 7 - i
+    product = num * (2**k)
+    sum_nums_arr << product
+    # binding.pry
+  end
+
+  dec_num = 0
+  sum_nums_arr.each do |num|
+    dec_num += num
+    # binding.pry
+  end
+  return dec_num
   raise NotImplementedError
 end
+
+puts "Welcome to the binary to decimal converter."
+puts "You will enter an 16 bit decimal number in the form of 8 0's or 1's."
+bin_arr = get_binary
+puts "Converting #{bin_arr} to decimal..."
+p binary_to_decimal(bin_arr)