現在我們將做一批練習，在練習的過程中你需要鍵入代碼，并且讓它們運行起來，我不會解釋太多，因為這節的內容都是以前熟悉的。這節練習的目的是鞏固你學到的東西，我們幾輪練習后再見。不要跳過這些習題，不要復制粘貼！ ~~~ puts "Mary had a little lamb." puts "Its fleece was white as %s." % 'snow' puts "And everywhere that Mary went." puts "." * 10 # what'd that do? end1 = "C" end2 = "h" end3 = "e" end4 = "e" end5 = "s" end6 = "e" end7 = "B" end8 = "u" end9 = "r" end10 = "g" end11 = "e" end12 = "r" # notice how we are using print instead of puts here. change it to puts # and see what happens. print end1 + end2 + end3 + end4 + end5 + end6 print end7 + end8 + end9 + end10 + end11 + end12 # this just is polite use of the terminal, try removing it puts ~~~ # 你應該看到的結果 * * * * * ~~~ $ ruby ex7.rb Mary had a little lamb. Its fleece was white as snow. And everywhere that Mary went. .......... CheeseBurger $ ~~~ # 加分習題 * * * * * 接下來幾節的加分習題是一樣的。 1. 逆向閱讀，在每一行的上面加一行注釋。 2. 倒著閱讀出來，找出自己的錯誤。 3. 從現在開始，把你的錯誤記錄下來，寫在一張紙上。 4. 在開始下一節習題時，閱讀一遍你記錄下來的錯誤。并且盡量避免在下個練習中再犯相同的錯誤。 5. 記住，每個人都會犯錯。程序設計師和魔術師一樣，他們希望大家認為他們從不犯錯，不過這只是表象而已，他們每時每刻都在犯錯。