如何在Ruby中重新创建（每次创建新的）数组？

我错过了为每对数字创建新数组然后把每一对的总和？ 顺便说一句，是否有可能通过’，’在一行输入一对数字？

arr = [] sum = 0 puts "How much pair of numbers do you want to sum?" iter = gets.to_i iter.times do |n| puts "Enter pair of numbers: " a = gets.to_i b = gets.to_i arr << a arr << b end iter.times do |n| puts "Here are the sums: " arr.each { |x| sum += x } puts sum end 

输入必须是这样的：

 2 # Number of pairs 562 -881 # First pair 310 -385 # Second pair 

所以输出将是：

 -319 -75 

Answer 1

对于问题的第一部分，您可以像这样修改代码：

 arr = [] sum = 0 puts "How much pair of numbers do you want to sum?" iter = gets.to_i iter.times do |n| puts "Enter pair of numbers: " a = gets.to_i b = gets.to_i arr << [a, b] # store a new 2-element array to arr end iter.times do |n| puts "Here are the sums: " arr.each { |a, b| puts a + b } # calculate and output for each end 

对于问题的第二部分，您可以：

  a, b = gets.split(',').map(&:to_i) 

并像这样重做计算/输出部分（只有一个循环）：

 puts "Here are the sums: " arr.each { |a, b| puts a + b } # calculate and output for each 

加上一些error handling。