一、实验目的：编制一个源程序的输入过程，从键盘、文件或文本框输入若干行语句，依次存入输入缓冲区（字符型数据）；并编制一个扫描子程序，该子程序中每次调用能依次从存放源程序的输入缓冲区中读出一个有效字符。-an experimental Objective : To develop a source of the entry process, from the keyboard, Document text box or import a number of firms statement, in order, the importation into the buffer zone (character data); and the preparation of a scan subroutine, The subroutines can be called for each order placed source from the input buffer read out an effective character.