Re: [問題] 多重迴圈

看板Ruby作者shewer (shewer)時間10年前 (2015/03/22 19:54)推噓0(0推 0噓 0→)

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※ 引述《marklaiw (漂亮的房子)》之銘言： : 剛剛用其它語言的方式寫多重迴圈,想寫個簡單的九九乘法表XD : r=1 : c=1 : while (r<10) do : while (c<10) do : puts 'r:'+r.to_s+',c: '+c.to_s : c+=1 : end : puts 'r:'+r.to_s : r+=1 : end (1..9).each { |r| (1..9).each { |c| print "#{r} * #{c} = %3d |" %(r*c) } puts } 1 * 1 = 1 |1 * 2 = 2 |1 * 3 = 3 |1 * 4 = 4 |1 * 5 = 5 |1 * 6 = 6 |1 * 7 = 7 |1 * 8 = 8 |1 * 9 = 9 | 2 * 1 = 2 |2 * 2 = 4 |2 * 3 = 6 |2 * 4 = 8 |2 * 5 = 10 |2 * 6 = 12 |2 * 7 = 14 |2 * 8 = 16 |2 * 9 = 18 | 3 * 1 = 3 |3 * 2 = 6 |3 * 3 = 9 |3 * 4 = 12 |3 * 5 = 15 |3 * 6 = 18 |3 * 7 = 21 |3 * 8 = 24 |3 * 9 = 27 | 4 * 1 = 4 |4 * 2 = 8 |4 * 3 = 12 |4 * 4 = 16 |4 * 5 = 20 |4 * 6 = 24 |4 * 7 = 28 |4 * 8 = 32 |4 * 9 = 36 | 5 * 1 = 5 |5 * 2 = 10 |5 * 3 = 15 |5 * 4 = 20 |5 * 5 = 25 |5 * 6 = 30 |5 * 7 = 35 |5 * 8 = 40 |5 * 9 = 45 | 6 * 1 = 6 |6 * 2 = 12 |6 * 3 = 18 |6 * 4 = 24 |6 * 5 = 30 |6 * 6 = 36 |6 * 7 = 42 |6 * 8 = 48 |6 * 9 = 54 | 7 * 1 = 7 |7 * 2 = 14 |7 * 3 = 21 |7 * 4 = 28 |7 * 5 = 35 |7 * 6 = 42 |7 * 7 = 49 |7 * 8 = 56 |7 * 9 = 63 | 8 * 1 = 8 |8 * 2 = 16 |8 * 3 = 24 |8 * 4 = 32 |8 * 5 = 40 |8 * 6 = 48 |8 * 7 = 56 |8 * 8 = 64 |8 * 9 = 72 | 9 * 1 = 9 |9 * 2 = 18 |9 * 3 = 27 |9 * 4 = 36 |9 * 5 = 45 |9 * 6 = 54 |9 * 7 = 63 |9 * 8 = 72 |9 * 9 = 81 | : 輸出結果: : r:1,c: 1 : r:1,c: 2 : r:1,c: 3 : r:1,c: 4 : r:1,c: 5 : r:1,c: 6 : r:1,c: 7 : r:1,c: 8 : r:1,c: 9 : r:1 : r:2 : r:3 : r:4 : r:5 : r:6 : r:7 : r:8 : r:9 : ====== : 請問是我迴圈寫法錯了嗎? @_@ : 網路上都只有教一層的,或者是用for的 : while 不能這樣寫嗎? @_@ -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 218.161.70.195 ※ 文章網址: https://www.ptt.cc/bbs/Ruby/M.1427025279.A.791.html