五个数字有多少种组合？怎么将组合全部打印出来？
有五个数1,2,3,4,5
要算出所有不同组合，比如 1 2 3 4 5是第一个， 1 2 3 5 4 是第二个，1 2 5 4 3是第三个，当然顺序无所谓，就是想求出所有的组合将其打印出来即可，个人的数学功底实在尴尬，希望各位高手能不吝赐教啊，谢谢
[解决办法]
可以尝试多重循环foreach( int i in list){int i in list{……} }
子层的集合排除父层以及父父层中的i
[解决办法]
[code=VB.NET][/code]
Dim shu() As String
Dim s As Integer
For a = 1 To 5
For b = 1 To 5
If b <> a Then
For c = 1 To 5
If c <> b And c <> a Then
For d = 1 To 5
If d <> b And d <> a And d <> c Then
For f = 1 To 5
If f <> b And f <> a And f <> c And f <> d Then
s += 1
ReDim Preserve shu(s)
shu(s) = a & "," & b & "," & c & "," & d & "," & f
MsgBox(shu(s))
End If
Next
End If
Next
End If
Next
End If
Next
Next
[解决办法]
http://topic.csdn.net/u/20110616/13/1958e017-f132-4f26-90cb-3da8c0b4eed5.html
[解决办法]
傻一点的方法：5个位置循环5次，每次取一个字符，5次的话就5个，然后组合，最后输出。
[解决办法]
