实验名称：操纵字符串。

实验要求：提示用户输入一个句子(英文,并且按enter键结尾)，该程序将句子中的字母按ASCII码编码顺序重新排列，排列后的单词的长度要与原始句子中的长度相同。-Laboratory name: string manipulation.

The experimental requirements: prompt the user for a sentence (in English, and press enter to end), the program will sentence according to rearrange the ASCII coding sequence of the letters, the length of the arrangement after the words to the same length as the original sentence.