※ 引述《marklaiw (漂亮的房子)》之铭言：
: 刚刚用其它语言的方式写多重循环,想写个简单的九九乘法表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 |
: 输出结果:
: 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
: ======
: 请问是我循环写法错了吗? @_@
: 网络上都只有教一层的,或者是用for的
: while 不能这样写吗? @_@