1、将所输入的字符串显示后, 再反序将它再次显示列出。 2. 用调试方法查出错误并改正程序中的错误，使得程序能够正确输出。-1, displays the character string input, then it will be displayed again in reverse order listed. 2. The testing method used to detect errors and correct errors in the program so that the