字处理演示程序 实现书上程序已经有的字处理功能，即左移，右移和插入的功能 扩展该字处理程序的功能，使其拥有上移，下移和删除的功能 -word processing demonstration program written procedures have been some word processing function, which is to the left. the shift to right and inser

字处理演示程序 实现书上程序已经有的字处理功能，即左移，右移和插入的功能 扩展该字处理程序的功能，使其拥有上移，下移和删除的功能 -word processing demonstration program written procedures have been some word processing function, which is to the left. the shift to right and inser