# Torbert 9.7.2007

#def find_sum ex
#  total = 0
#  ex.each { |term| total + term }
#  total
#end

def find_sum ex
  ex.inject(0) { |total, term| total + term }
end


print("Enter some arithmetic, addition of positive numbers only: ");
expression = gets().chomp.split "+"
puts "\n#{expression.inspect}"

k=0
begin
  expression[k] = expression[k].strip.to_i
  k+=1
end while k!= expression.length
puts expression.inspect()

sum = find_sum(expression);

puts "\nThe sum is #{sum}\n"
puts "#{expression.map{|e| e.to_s}.join(" + ")} = #{sum}\n\n"