1.将一个字符串数组按字典序重新排列

2.分析字符串,分别输出字符串的单词,并统计单词个数

3.实现字符串的反转-1. Will be an array of strings to rearrange the order according to the dictionary 2. Analysis of the string, respectively, the output string of words, and word statistics the number of 3. To achieve reversal of the string