****************1000Help!Help!Help!求乘法原理的算法
现在n个字符数组
array1 {"X1Y1","X1Y2","3a","4",..,"X1Ym1"} //长度 m1 >=1
array2 {"X2Y1","X2Y2",..,"X2Ym2"} //长度 m2 >=1
...
arrayn {"XnY1","sfsfsfaafb",..,"X2Ymn"} ////长度 mn >=1
求每次从n个数组中的各数组各取一个值,组成的n项相加的排列字符串,相当于概率中的乘法法则
如
X1Y1+X2Y1...+XnY1
...
X1Ym1+X2Ym2 ...+X2Ymn
共有m1*m2*...*mn个排列字符串
求算法.