在程序设计部分主要讨论了在读写函数表达式时，词法分析与语法分析的C＋＋实现方法，这也正是本程序编写的难点与重点。之后介绍了复化求积法和Romberg求积法的编写步骤及方法以及数值积分的实现方法。-in the process of discussing some of the major functions of the reader expression, lexical analysis and parsing of C++ methods, which is precisely what