从键盘输入任意一个字符串，要求以星号“*”为结束符，然后将其内容保存到当前目录的myfile.dat文件中，之后从文件中读取该字符串并显示。要求将该文件中的字符以逆序形式全部打印出来，将相对于文件头偏移量为偶数位置的字符全部打印出来。-Enter any of the string from the keyboard to require an asterisk " *"　as the terminator, and then save its contents to the current directory myfile.dat file, then read from the file and display the string. Requested that the documents in the form of all the characters in reverse order print out the header offset relative to the location of the characters is even all the print.