The edit and delete functions work in a relatively straightforward way and should not need additional explanation.
编辑和删除功能的原理相对来说比较简单，应该不需要另加解释。
tmp/CalendarCrypt.pl is a Perl program described in a later section that handles the encryption, decryption, and secure delete functions.
tmp/CalendarCrypt.pl是一个Perl程序（将在后面介绍），它处理加密、解密和安全删除函数。
Drawing software, MFC implementation, such as graphics move, rotate, select and delete functions.
说明：画图软件，MFC实现，有图形移动、旋转、选取、删除等功能。
A book, kept the name, phone number, address, etc., with the input, find, add, modify and delete functions.
建立一个通讯录，存放有姓名、电话号码、住址等，具备输入、查找、添加、修改及删除等功能。
A book, kept the name, phone number, address, etc., with the input, find, add, modify and delete functions.
建立一个通讯录，存放有姓名、电话号码、住址等，具备输入、查找、添加、修改及删除等功能。
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