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&& Brittany Jones Ampers #25

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d2a663f
created method to return decimal from binary
brittanyrjones Feb 25, 2018
559d549
created Mathod
brittanyrjones Feb 25, 2018
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18 changes: 17 additions & 1 deletion lib/binary_to_decimal.rb
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Original file line number Diff line number Diff line change
@@ -1,9 +1,25 @@
require 'minitest/autorun'
require 'minitest/reporters'
# A method named `binary_to_decimal` that receives as input an array of size 8.
# The array is randomly filled with 0’s and 1’s.
# The most significant bit is at index 0.
# 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.


#Creates randomly filled array with 0's and 1's, 8 times.
binary_array = []
8.times do
binary_array << rand(0..1)
end

#Create method named binary_to_decimal to return decimal value. input is binary array.
def binary_to_decimal(binary_array)
raise NotImplementedError
bit_num = binary_array.length
decimal_num = 0
bit_num.times do |index|
decimal_num += binary_array[(bit_num - index) - 1] * (2 ** index)
end
return decimal_num
end