1、本程序在初始化字符集后应能进行字符文件的编码、译码功能。

2、演示程序应以用户和计算机对话的方式执行，即在计算机终端上显示提示信息之后，由用户在键盘上输入程序中规定的命令，相应的输入数据和结果显示在其后面。

3、程序执行的命令包括：

（1）初始化；（2）编码；（3）译码；（4）印编码文件；（5）退出程序；

-1, the program should be able to initialize character set for character files after encoding, decoding functions. 2, the demo should be talking to a computer user and the manner that the message displayed on the computer terminal, the keyboard input by the user specified in the command procedure, the corresponding input data and results are displayed in the back. 3, the program execution of the command include: (1) initialization　(2) encoding　(3) decoding　(4) India encoded file　(5) to exit the program