fileObj = File.new ("C:\\Ruby\\customer_details.txt", "a")
puts "Enter your first name"
first_name=gets
puts "Enter your last name"
last_name=gets
puts "Enter your email address"
email=gets
customer_info=[]
customer_info[0]=first_name
customer_info[1]=last_name
customer_info[2]=email
fileObj.syswrite(customer_info)