十进制到十六进制终端脚本

Posted 2021-02-26

def decimal_to_hex(x)
  x = x.to_i
  q = 1
  r = []
  while q > 0 
    q = x / 16
    r << x % 16
    x = q
  end
  i = 0
  r.each do |n|
    r[i] = case n
    when 10
      then r[i] = 'A'
    when 11
      then r[i] = 'B'
    when 12
      then r[i] = 'C'
    when 13
      then r[i] = 'D'
    when 14
      then r[i] = 'E'
    when 15
      then r[i] = 'F'
    else
      n = n
    end
    i += 1
  end
  r.reverse.join
end
 
number = gets.chomp
p decimal_to_hex(number)