例子1：
print "How old are you ?"
age = gets.chomp()
print "How tall are you ?"
height = gets
print "How much do you weight ?"
weight = gets.chomp()
puts "so, you're #{age} old, #{height} tall and #{weight} heavy."
输出的内容如下所示：
How old are you ?11
How tall are you ?23
How much do you weight ?23
so, you're 11 old, 23
tall and 23 heavy.
例子2：
print "How old are you ?"
age = gets.chomp()
print "How tall are you ?"
height = gets.chomp()
print "How much do you weight ?"
weight = gets.chomp()
puts "so, you're #{age} old, #{height} tall and #{weight} heavy."
输出内容如下：
How old are you ?11
How tall are you ?23
How much do you weight ?23
so, you're 11 old, 23 tall and 23 heavy.
总结：gets和gets.chomp的区别在于，gets的input中包括\n，而gets.chomp的input中不包括\n。
