键盘输入一个不重复的字母字符串,求它的所有组合方式:例如
"abc"
"a","b","c"
"ab","ac"."bc"."ba","cb","ca"
....
想的是可以先转成字符数组,,字符串长度为多少就建多少个一样的字符数组,在多个数组洗牌拼接,不懂对不对

怒水一贴！