~~~ formatter = "%s %s %s %s" puts formatter % [1, 2, 3, 4] puts formatter % ["one", "two", "three", "four"] puts formatter % [true, false, false, true] puts formatter % [formatter, formatter, formatter, formatter] puts formatter % [ "I had this thing.", "That you could type up right.", "But it didn't sing.", "So I said goodnight." ] ~~~ # 你应该看到的结果 * * * * * ~~~ $ ruby ex8.rb 1 2 3 4 one two three four true false false true %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s I had this thing. That you could type up right. But it didn't sing. So I said goodnight. $ ~~~ # 加分习题 * * * * * 1. 自己检查结果，记录你犯过的错误，并且在下个练习中尽量不犯相同的错误。