1．　　演示程序以用户和计算机的对话方式执行，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演示程序中规定的运算命令；相应的输入数据和运算结果显示在其后。-1. Demo user and computer dialogue manner, that is displayed on the computer terminal " reminder"　after, by the user at the keyboard inputs illustrate procedures provided operators Mingling　Xiang Ying' s Shuru data and calculation results in the following.