为了学好Ｍ语言，首先要看懂一些典型的例子，其次要练习输入这些例子．对于输入Ｍ语言的程序设计，必须集中练习，而且必须在理解程序语义的前提下来练习．否则，一旦出错便不知道如何改正，最后要自编一些程序．本文作为上一篇的续篇，主要是围绕这三方面来展开．文中的... In order to learn M language, we must first understand some typical examples, and secondly practice to input these examples. For the programming of the input M language, it is necessary to focus on practice, and must be practiced under the premise of understanding the semantics of the program. Otherwise, once you make a mistake, you do not know how to correct it. Finally, you must make some programs yourself. This article as a sequel to the previous one is mainly focused on these three aspects. In the text...